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Thread: TV Aerials, HD STBs, HD DVB-T Receivers, SAT TV.

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    TV Aerials, HD STBs, HD DVB-T Receivers, SAT TV.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Being that Coffee Snobs is predominently male membership, I thought there might be a good chance that a few here would either be in the industry or have an interest in the technology in the title of my post. * Im hoping I might be able to pick some smart brains so I can sort out some technical aspects of my own currently poor quality TV reception. *

    Heres a quick rundown;

    TV: I have a LCD TV hooked up to SD STB,.. (not sure whether its worth upgrading to a HD STB just yet,.. but will eventually)

    Aerial: The aerial on the roof, was installed when we built 10yrs ago,.. dont recall what it is, but dont think it is anything flash..can provide pics if needed. Reception was good once, without SD STB and with, but over the years has gotten worse.. and two out of the three main channels are cwap,...maybe because of extra buildup, trees?? I dunno. *I noticed that the aerial is not pointing in the same direction as the neighbors,..though they all have flashier looking aerials than ours so who knows. I also noticed, that aside from the direction,.. it looks to me like the aerial is not really tall enough and doesnt quite make it over the crest of our iron roof. Surely it would benefit being higher and pointing more towards the tower??

    Now,.. I know nothing about aerials,.. but Im guessing all aerials aint just aerials and there a different qualities and purposes??? *Is there such a thing as a HD aerial? if so,..would it be benefitial to upgrade a HD?

    PC:I bought from Aldi last week a HD DVB-T receiver (been wanting one for over a year but waiting for prices to come down). A bargain on special for $59. It is fantastic!!!,. and has the potential to keep me very content by allowing me to watch/listen to whole TV programs on my computer while I surf the net and do all I do,..since I practically live on this computer (hubby controls the remote here and is a constant and rapid channel hopper, so I never get to watch a whole program unless I sit right in front of the TV with the remote under my butt). *Anyway,.. again,.. reception is so bad. I can get one channel really well and the other 22 are cwap. *I tuned in the HD DVB-T receiver via the aerial outlet at the TV,..and I have another outlet near the computer but it gets little reception from it,..I think I will need to get up in the roof and see why this outlet is not giving me the same reception and the TV outlet and maybe connect it to the aerial differently. *Buuuut,..it is the aerial that I really need to sort out first me thinks.

    Anyway,.. any advice, tips at all would be greatly appreciated.



  2. #2
    Sleep is overrated Thundergod's Avatar
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Im no expert Remy but did get an aerial installed last week.

    Currently I use rabbit ears to run the TV thru the PC and it OK but should have thought to run an extra point to the study.
    As it is though he did provision for it so I could run the cable myself.

    He mounted our aerial below the crest of our tiled roof.

    From what I understand, unless everyone else has got it wrong your aerial should be pointing in the same direction as the neighbors.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Remy,

    Firstly, yes there are a range of aerials - but they arent designed for a special purpose (analogue, STB, HD etc) but rather for "gain" the amount of signal which they capture. Bigger aerials with more elements (the rods which come away from the centre) are designed for areas with lower signal strength..... they have higher gain (and are more expensive!)

    Now the aerial MUST be pointed at the TV tower.... and certainly not at an iron roof (the iron roof acts just like a mirror does for light and reflects it). So if there is an iron roof between you and the transmitter tower.... raise the aerial so that it is above the roof for best reception.

    Outlets in the house. I assume they are the coax type (a round cable rather than the flat cable which was used many years ago). If they are coax then there will be a balun (a little box) at the aerial to convert the signal (I wont go into the technicalities).... this will deteriorate over time.... moisture will corrode the connections and spiders etc will make a home in it!! This will lose your signal. Also the coax which runs from that box into the house is attractive to rodents (especially rats) who will chew through it.... more signal loss.

    Now as you have more than one outlet.... the odds are whoever wired them up have just connected the two together with the coax.... that is a no-no. To run more than one outlet you need a splitter..... the cable from the aerial connects to that and then the two (or more) sockets are fed from the splitter. A splitter will reduce your signal - but not as much as the outlets just connected to each other will.

    Unless familiar with these items, it is often best to get a professional aerial installer to do the work..... it is expensive unfortunately but they will have the right gear for your aerial and your installation.... (gain of aerial, possibly a splitter with built in amplifier etc,,, etc.... and also know where to point the aerial for best reception.

    You can get all the bits yourself and do all the work yourself - but it is not a trivial exercise unless you know a bit about electronics....

    Hope that helps and best of luck!

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Thundergod link=1206260940/0#1 date=1206265110
    Im no expert Remy but did get an aerial installed last week.
    OMG..what a coinkidinks!! *thud*

    Currently I use rabbit ears to run the TV thru the PC and it OK but should have thought to run an extra point to the study. As it is though he did provision for it so I could run the cable myself.
    When we built this house,.. we had some aerial outlets wired up but not connected to aerial and I cant remember whether this one where my computer is was set up this way or to the aerial (need to get up they and have a look),.. those not connected to the aerial were originally meant for connecting kids TVs to a central video/dvd player, but we never bothered with it and they now have there own dvd player anyway. *In hindsight we should have had them connected to the aerial because none of them have good TV reception in their rooms. ::)

    I would have thought though that this one under my computer desk,.should be connected to the aerial because it is in the family room about 5 metres across the room the big TV (it would have been aerial to allow for furniture rearrangements me thinks,..yet the reception from this outlet is near zilch).

    He mounted our aerial below the crest of our tiled roof.

    From what I understand, unless everyone else has got it wrong your aerial should be pointing in the same direction as the neighbors.
    Aaar,.. yep as I suspected,..sounds like mine is waaay too low and facing the wrong direction. Thanks heaps TG

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Have a read through the DTv forums. Great source of info and should be able to find a reputed installer on there.
    http://www.dtvforum.info/


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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/0#2 date=1206265265
    Remy,

    Firstly, yes there are a range of aerials - but they arent designed for a special purpose (analogue, STB, HD etc) but rather for "gain" the amount of signal which they capture. Bigger aerials with more elements (the rods which come away from the centre) are designed for areas with lower signal strength..... they have higher gain (and are more expensive!)
    This is great to know,...and I wont make a fool of myself asking for a HD aerial either ::). The guy next door has one that looks like a space craft,.. it has two outer *wings that are parrallel facing and rods are running vertical. The middle section looks like a regular aerial....erm like mine in fact.

    Now the aerial MUST be pointed at the TV tower.... and certainly not at an iron roof (the iron roof acts just like a mirror does for light and reflects it). So if there is an iron roof between you and the transmitter tower.... raise the aerial so that it is above the roof for best reception.
    its definitely not pointing towards the TV tower, and definitely too low in that case.

    Guess what Ill be doing tomorrow *heavy sigh*. *This should be interesting,.. because we have a very high pitch on the roof and the aerial is on top of one continuous face, running from eave to over 2nd storey loft *:o,.. thankfully where they installed the aerial,. it is right next to a courtyard (oh that would mean a 2 storey drop into the courtyard from the aerial..hmm....gees I hope the shadecloth isnt rotten,I had a laugh) and I will be walking up a timber beam of the pergola(which follows the same pitch but with shadecloth on will give some grip). If I dont post again......... *::)

    Outlets in the house. I assume they are the coax type (a round cable rather than the flat cable which was used many years ago). If they are coax then there will be a balun (a little box) at the aerial to convert the signal (I wont go into the technicalities).... this will deteriorate over time.... moisture will corrode the connections and spiders etc will make a home in it!! *This will lose your signal. Also the coax which runs from that box into the house is attractive to rodents (especially rats) who will chew through it.... more signal loss.
    Yes they are all coax cables. Yes I saw the balun(though didnt know its name or purpose)and it is funny you should mention deterioration because when I was looking up at the aerial,.. the first thing that crossed my mind after thinking about the direction and height of it, was that the attached cable and box thingy has been weathered for 10 years!!!.. how could it still be working. The cable does look weathered.

    Now as you have more than one outlet.... the odds are whoever wired them up have just connected the two together with the coax.... that is a no-no. To run more than one outlet you need a splitter..... the cable from the aerial connects to that and then the two (or more) sockets are fed from the splitter. A splitter will reduce your signal - but not as much as the outlets just connected to each other will. Unless familiar with these items, it is often best to get a professional aerial installer to do the work..... it is expensive unfortunately but they will have the right gear for your aerial and your installation.... (gain of aerial, possibly a splitter with built in amplifier etc,,, etc.... and also know where to point the aerial for best reception.

    You can get all the bits yourself and do all the work yourself - but it is not a trivial exercise unless you know a bit about electronics....

    Hope that helps and best of luck!
    I have a feeling they might be wired together you know,.. cos I dont recall seeing a splitter on the cable up there. *I will have a crack at doing this myself,.. I have wired heaps of other stuff including extra phone outlets here, computer networking (my job once), all my car stereos bar the last two that came with decent stereos in them ;D. *I am guessing I can buy a splitter to accomodate four or five cables? cos if I am going to go to this much trouble, I am going to get it all right once and for all and hook up the kids rooms too. *The cables are already through the wall cavities,.. ready and waiting for me to hook em up to a vid/dvd player like I mentioned in my post to TG,.. but I will connect them to the aerial instead. Will I be correct in assuming that cable connectors will also mean some loss in signal. I most likely will need to buy more cable and join to whatever is already up there to reach the aerial as the cable allowed from the kids rooms would likely only be enough to travel down the cavity wall to the outlet positioned at the back to the familyroom TV .

    Thanks JavaB,..great info,..I have a better understanding now and will get the aerial sorted out first.





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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by rice link=1206260940/0#4 date=1206272584
    Have a read through the DTv forums. Great source of info and should be able to find a reputed installer on there.
    http://www.dtvforum.info/
    no,.well dar... I never thought to search specifically for a digital TV forum *smack*. * I tried searching for TV reception in [local area] and aerials *Thanks Rice, I will check that out.

    EDITED TO ADD: Awesome forum Rice!

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Just to add to my above post....

    Digital TV isnt subject to ghosting and all the other nasties that affect analogue TV....

    But just like digital phones compared to the old analogue phones.... Analogue phones would work with poor signals.... you would get noise and drop outs.... but they worked! Digital phones require a sufficiently strong signal or they wont work at all - and the same with digital TV.

    Any aerial will work as long as it collects enough signal..... and your cabling is good enough to get it to the STB...... but if it isnt being collected or it is being lost along the way .... it wont work!

    I have 4 televisions (two digital and 2 analogue) in 4 different rooms all running off the same aerial..... plus Foxtel and the DVD player output are also distributed to all 4 rooms on the same coax....

    That was a fun exercise.... but required lots of cable/connector termination, soldering etc.....

    By the way, the other advantage of using an installer (well a good one) is that they have a signal strength meter and will check the best location to instal the aerial..... and that is VERY important unless you are close to the towers....

    And Im not, nor have even been, involved in installing TV antennae..... but as a licensed amateur radio operator have installed plenty of antennae.... both transmitting and receiving..... and as that TV program says..... its all about "location, location, location" (and the correct choice of components....)

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    Sleep is overrated Thundergod's Avatar
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    In case it helps Remy, my splitter was put under the house as the installer ran the cable from the aerial to there and then split to all the room points.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/0#7 date=1206275400
    Just to add to my above post....

    Digital TV isnt subject to ghosting and all the other nasties that affect analogue TV....
    then this would mean my SD STB is not connected to my TV properly then?.. or is it that I am still just receiving only analogue somehow? Now Im confused. I have a SD STB plugged in to the main TV. Arent all stations now transmitting digital as well as analogue. I know HD is again different and there are currently only SC10HD, ABC HDTV, WINTVHD, PrimeHD, & SBS HD available here.. all currently offering limited HD viewing and lots of HD Demo loops *sigh*.. Surely I should not be getting ghosting then if Im receiving digital correctly through my STB.

    But just like digital phones compared to the old analogue phones.... Analogue phones would work with poor signals.... you would get noise and drop outs.... but they worked! Digital phones require a sufficiently strong signal or they wont work at all - and the same with digital TV.
    aaar ok,.. so maybe my signal has gotten so poor in quality that the digital has actuall dropped right out....it mightbe possible that I am only getting analogue now then. Like I said earlier,.. the picture used to be awesome,..when I first connected the STB I remember the picture being significantly better than experienced before. The ghosting and sometimes channel dropout completely has crept in over say the last year -18months.

    Any aerial will work as long as it collects enough signal..... and your cabling is good enough to get it to the STB...... but if it isnt being collected or it is being lost along the way .... it wont work!
    right.. got it.

    I have 4 televisions (two digital and 2 analogue) in 4 different rooms all running off the same aerial..... plus Foxtel and the DVD player output are also distributed to all 4 rooms on the same coax....That was a fun exercise.... but required lots of cable/connector termination, soldering etc.....
    We have 8 TVs ::) and 2 old-but-still-working-poorly..on the way to the dump. All have cwap reception atm,. the 3 kids TVs have little to no reception and they can only really watch dvds on their TVs because it is to frustration trying to watch TV programs on them. I really do need to get in and sort this out,. not sure I want to go to the trouble of soldering,.. have done soldering before but could I be bothered to try and find all the soldering gear in the garage?? Nope!

    By the way, the other advantage of using an installer (well a good one) is that they have a signal strength meter and will check the best location to instal the aerial..... and that is VERY important unless you are close to the towers....
    Yeah,.. Im of two minds whether to just get on the phone to an installer,. would certainly be an easier option (though more expensive obvioulsy).. might just see what I can do first.

    And Im not, nor have even been, involved in installing TV antennae..... but as a licensed amateur radio operator have installed plenty of antennae.... both transmitting and receiving..... and as that TV program says..... its all about "location, location, location" (and the correct choice of components....)
    Yeah.... be all accounts,.. my location should still be good despite the area being more built up.... the components I think, is what needs some attention.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Thundergod link=1206260940/0#8 date=1206280267
    In case it helps Remy, my splitter was put under the house as the installer ran the cable from the aerial to there and then split to all the room points.
    Im on a slab(slab heating too *;D *mmmmmm) There are two more roof cavities I need to check... these cavities are smaller single roof cavities but closer to the aerial itself,.. its possible the splitter could be in one of these. Ooooooh redbackkkkks *shudder*

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Soldering isnt necessarily the only option available Remy,

    If you head to your nearest DSE or Jaycar outlet with a rough plan of the existing/preferred layout, they will be able to supply you with everything you need to do the job without the need to solder connections..... All the components are dry-fit designs and only require that you know how to strip the insulation from the ends of the cables and fit the various connectors, etc.

    Have recently rewired the antenna cabling in our house end never needed the soldering iron at all 8-).

    All the best,
    Mal.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Mal link=1206260940/0#11 date=1206327089
    Soldering isnt necessarily the only option available Remy,

    If you head to your nearest DSE or Jaycar outlet with a rough plan of the existing/preferred layout, they will be able to supply you with everything you need to do the job without the need to solder connections..... All the components are dry-fit designs and only require that you know how to strip the insulation from the ends of the cables and fit the various connectors, etc.

    Have recently rewired the antenna cabling in our house end never needed the soldering iron at all 8-).

    All the best,
    Mal.
    Thats what I was hoping/imagining it would be. JavaB.. has probably done something a little more flashy than I will need to be doing. Yep stripped many-a-wire and fitted with connectors/lugs/terminals in my time...too easy. *

    Didnt get a chance today to check the aerial,..furniture moving then rain *::) was on the cards today instead. Too late to get in the roof too...Im stooofed! *So tomorrow I will fight my way through the sheets of spider webs,.. its revolting,.. redbacks galore up there,..might spray on my way back out me thinks.!

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Remy link=1206260940/0#12 date=1206332717

    Thats what I was hoping/imagining it would be. JavaB.. has probably done something a little more flashy than I will need to be doing. Yep stripped many-a-wire and fitted with connectors/lugs/terminals in my time...too easy.
    ;) ;)

    Yep, my electronics work is just like my coffee..... I like to do it the best way possible!

    I must admit I dont like the screw fit terminals.... as they dont always make good connection further down the track (more subject to corrosion and signal loss)..... but if you get good ones (read more expensive!!) then they probably are OK.....

    To me the el cheapo screw fit connectors vs proper solder connectors is a bit like a $100 coffee machine compared to a Silvia (6910 8-))...... both will produce cr@p coffee if you dont know what you are doing..... but only the Silvia/6910 will produce outstanding coffee when you do!

    However, having said that.... most commercial firms use the el cheapo connectors anyway ::)

    And with your number of outlets you definitely need an amplified splitter (and as Mal suggested - Dick Smith and Jaycar can supply these).

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Yeah,.I dont like screw fit terminals either,. crimp fit not so bad if done properly,.. in situations where the wires are subject to moving, vibrating etc,.. like car stereos systems,..its only a matter of time before your speakers turn themselves on and off according to whether youre doing a right or left hand turn *>:( *::) . *Up in the roof,..as long as the rats *:-/ leave the cables alone and well meaning tradies take care where they step,.screw fit should be fine as youd know because they wont be moving at all.

    Yep Ill pick up and amplified splitter,.. DSE is just around the corner,.. I love DSE :} .

    Here is the aerial I have to get to,.. angle of the roof doesnt look accurate in the pics because of the where I was standing, but to get some idea,..workmen wont get up it,. the aircon tradesman freaked and they had to make alternative arrangements to fit the ac on another face which was more friendly,..and legally had to have more than one guy there at all times and they used harnesses,..I cant remember what angle it is,..and just asked hubby if he could remember and he said.."bloooody steep" ;D,..so the roof is not ideal to climb up on ::)..the roof if a lot longer/higher than it looks here, with another 1.5mtrs up from the point where the aerial is attached. Good footwear is a must.

    In the pics, the aerial also looks like it clears the crest of the roof, but it doesnt.. the top of the aerial appears to be level or even a little lower than the top of the crest in real life. The aerial needs to come right up to the top of the pole and swung anti-clockwise about 45deg. It might even be better if fitted a longer pole??. Seems the neighbors aerials are quite a lot higher off their rooftops, and I think that at best,.. this aerials top half will clear the crest. Its likely that this was how it was originally,.and has probably just worked its way down the pole and around,..but will see how tight the U bolt is when I get up there to determine for sure if its just worked its way down,..and whether it could benefit with a longer pole. I can hardly wait to get up there ::) :-/

    [img]www.studioheath.com/images/bits/aerial1.jpg[/img]

    [img]www.studioheath.com/images/bits/aerial2.jpg[/img]






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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/0#13 date=1206334382
    I must admit I dont like the screw fit terminals.... as they dont always make good connection further down the track (more subject to corrosion and signal loss)..... but if you get good ones (read more expensive!!) then they probably are OK.....
    Yeah, probably not the Rolls Royce option but if you get decent quality components, and they arent that much more expensive to buy than the el-cheapos in reality, its quite a viable option. And with the judicious application of a good quality industrial sealant they do stand the test of time. Anyway, it doesnt matter which termination method you use, soldering/screw/crimp etc, if there is vibration or cyclic movement to contend with, then the entire end termination needs to be appropriately fixed so as to avoid ultimate connection failure.

    Anyhow Remy, you sound like youve got both knowledge and experience to make a pretty good job of it so all power to you girl.... 8-) Take all the necessary safety precautions wont you :-?.

    Mal.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Mal link=1206260940/15#15 date=1206346460
    Anyhow Remy, you sound like youve got both knowledge and experience to make a pretty good job of it so all power to you girl.... 8-) Take all the necessary safety precautions wont you :-?.

    Mal.
    Sure will,. last thing I need is to be running around after my family while Im maimed. First thing,.........while my preference would be to do the aerial while the rest of the family are at school or work,.. I will take precaution and wait til hubby is home...just in case I hit the deck. There is no real secure place to tie a rope harness unfortunately, and in case youre wondering why I will be doing it and not traditionally the hubby,I had a laugh... it comes down to this; Im fitter, 14yrs younger, light/nimble, have loads more patience, maintenance ability/knowhow, love this kinda stuff and will make less mess on the concrete if I fall *snort*

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    Mal Dimal's Avatar
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Remy link=1206260940/15#16 date=1206349215
    and will make less mess on the concrete if I fall *snort*
    Bloody ell Remy, lets not go there..... :o

    Mal.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Oh sorry REMY Ive only just noticed this post. :-[
    When I was an electrician (practising), I used to do a lot of antenna installs. We used what is known as RG-6 Quad shield Coaxial cable as it had (as the name suggests) 4 layers of shielding as opposed to the one or two layers in regular. We used the F-Type connectors (the ones that have a central pin, usually the coax conductor itself, with the threaded gland) which are far superior as far as reliability and longevity goes. Obviously the number of outlets and the length of the runs is something to think about as far as boosters etc are concerned. Its handy to run all the runs to a central position, say near the manhole for easy access.

    YeeZa

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Oh and if youre going on the roof, nothing beats a pair of Dunlop Volleys - dont know how they go on metal roofs though, hmm

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by YeeZa link=1206260940/15#18 date=1206398357
    Oh sorry REMY Ive only just noticed this post. :-[
    When I was an electrician (practising), I used to do a lot of antenna installs. We used what is known as RG-6 Quad shield Coaxial cable as it had (as the name suggests) 4 layers of shielding as opposed to the one or two layers in regular. We used the F-Type connectors (the ones that have a central pin, usually the coax conductor itself, with the threaded gland) which are far superior as far as reliability and longevity goes. Obviously the number of outlets and the length of the runs is something to think about as far as boosters etc are concerned. Its handy to run all the runs to a central position, say near the manhole for easy access.

    YeeZa
    Going up in the roof in about 1/2hour to check out the cabling there already. Just waiting for the ladder the stop dripping ::)... just brought it in from out in the pouring rain.
    I might need to check three seperate roof cavities,.. but hoping Ill find what I need in the first big cavity,. or at least in the second smaller one closer to the aerial itself. Will take the camera up with me and see if I can get pics of the type of cable and splitter if I can find one.

    Its still pouring rain here...grrrrr..so wont be able to fix the aerial today darn it...typical..hasnt rained here for weeks and just when I need a dry day, it wont stop raining. Its driving me nuts, especially now that I have the HD DVB-T receiver and the potential is there for me to view all channels (& watch entire programs without Remote Man taking control of viewing ::) ),. while Im working on the computer.......Im only a mere foot in height and a 45deg turn away from happiness. ;D Young son has a pair of volleys that I can fit into,. and I have some pretty good rubber sole runners,. will choose the best grip from those. Looking at it,. I think Ill have to walk up a beam on the edge of the shadecloth (hope theres no wood rot hee hee),.. might give better grip,..tho if the roof is warm, then the iron will would probably be fine,..will just see when the time comes.


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    Senior Member Magic_Matt's Avatar
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Sounds like a lot of expense and effort given the quality of TV these days ;)

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by m@ link=1206260940/15#21 date=1206400992
    Sounds like a lot of expense and effort given the quality of TV these days ;)
    Outside all the quality postings on this thread, this is a quality post [smiley=thumbsup.gif]

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by m@ link=1206260940/15#21 date=1206400992
    Sounds like a lot of expense and effort given the quality of TV these days ;)
    too true.. the stuff on TV these days is cwaaaaaaaaaaaap.... anything half decent is few and far between. *However *:D....this is one of the reasons why I suddenly give a hoot about the reception in this house ;) . *Believe me,..there is method in my madness,.. I have spent the last 10years not being able to watch TV in this house due to Remote Mans powerful force,...a force so great where he is able to block out other family members viewing status and change channels with such speed and dexterity it would make even the most patient persons blood boil.

    Why Remote Man is so powerful,.. he even continues to control the remote while nanna napping on the lounge every afternoon, and regains consciousness with any attempt to release the remote from his mighty grip,..or any attempt to override his control by changing channels or reducing volume on the TV,..and in a split second, takes full control once again.

    Why his vice-like grip is so strong,.. he was once painfully woken from a deep nanna nap by a remote melting in his white knuckled fist, and only a mild growl and the remote dropping to the ground were the obvious signs of his agony (true story,..the remote melted). *

    Remote Man is so unrelenting in his power over the TV,.. the remote often mysteriously vanishes when he leaves the room, and in time,. the remote reappears in wierd places like the backyard, bathroom, bedroom, kitchen, pantry, garage and car.

    I gave up trying to watch TV long ago and my computer became my source of brain numbing entertainment. But alas there is now hope for me....with my recent purchase of the HD DVB-T receiver for my computer,.. *I have controllllllllllllll of my TV viewing at last... I have been freeed from the power of Remote Man ,...and better still..because Im out and about many times a night picking up kids,.. I can record anything I like with the click of a button and watch it when I get back,...without 10mins of ads every 5 mins *;). *

    Yes quality TV programs are few and far between these days,.. but at least now I will get to watch them,.. and in the ultimately preferred way too..while surfin the net at the same time (I could never sit and just watch TV without doing anything else)....if only I can get the darn reception better so that I can tune in all the channels properly with my HD DVB-T. *Reception never bothered me before cos I never got to watch it whaahaahaaha,...poor "Remote Man. *;D

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Ok,.. found the splitterssss.

    A 4way splitter,.. and onto a 2way splitter. *:-? You can see Out2 goes to the 2Way(curl in cable there)
    [img]www.studioheath.com/images/bits/splitters.jpg[/img]

    And just wanted to crack the 4way open to see which one was the aerial IN.
    [img]www.studioheath.com/images/bits/splittergizzards.jpg[/img]

    Ok,..so from what I can determine, *5 out of the 5 outlets that I thought had aerial hookup, actually are! whoooot! ;). *

    I have the 3 more outlets in the kids rooms,... that I want to hook up too. I recall the electrician when we built 10yrs ago, saying he left a bundle of cable from their rooms tied up there (for me to hook up later),.. but no luck in finding it this morning and might need to track him down and ask if he can remember approximately where he stashed it. Itll be under the yellow batts somewhere, and had a look around where I expected it to be,.. but Im not keen to stir that stuff up searching when I dont have an approximate location.

    Soooooh,.. I will need a splitter (amplified yes?) to cater for 8 cables/outlets. Not sure what quality this cable is (it just says on it, 75[ch937] AIR SPACED COAXIAL CABLE U.V. STABILIZED.,.but it will have to do anyway. Dont think I could be bothered trying to re-cable with better quality or anything and I know 4 rooms would be impossible to re-cable because of the locations of rooms and floor joists over those rooms.

    So,..next... find the kids cables,.. and buy an amplified splitter(or two?)...still waiting for the rain to stop.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Yeah thats just normal RG-6. Thats totally fine. I forgot to mention you might need a power source for the booster. Something Im sure DSE sells, as well as a hex crimper, male f-type connectors, and youll be set! :)

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    From memory RG-6 Quad shielf also has a 75ohm impediance.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Yeha rather than looping from one 4 way to another 2 way, just get yourself an f-type rack splitter with a heap of outputs on it too!

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Remy,

    Yep looks pretty good!

    Id lose the 4 way passive splitters as YeeZa suggests above...

    They reduce the signal quite a bit..... and when "daisy chained" like yours.... the loss is considerable.....

    A multi-way amplified splitter (with at least the number of outlets required) is definitely the go....

    Id say most of your problem is at the pointy end - the antenna. Direction is wrong, it is too low and check for corrosion, spider nests etc in the balun and also corrosion where the balun connects to the aerial terminals.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by YeeZa link=1206260940/15#27 date=1206409170
    Yeha rather than looping from one 4 way to another 2 way, just get yourself an f-type rack splitter with a heap of outputs on it too!
    Cool thanks Yeeza,.. writing all this down before I go anywhere near DSE. Might also look online for the parts too beforehand,..it will help me know exactly what Im after (visual learner) and avoid brain fog in the store.

    Yeah,..thought the loop was a bit slack.. but suppose a 5 way might not have been in the truck ;D. I was thinking of getting an amplified 8way,..but wasnt sure if such a thing existed.. they do... well in the UK at least.... still looking for an OZ site.

    Ok,.. power source....can do.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Hi Remy,
    Just a thought…TV signals are usually propagated horizontally and therefore the antenna should be horizontally mounted….from the photo you posted it looks as though the antenna has rolled into a vertical position (hard to tell from the photo though)
    Cheers
    Bruce

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/15#28 date=1206409747
    Remy,

    Yep looks pretty good!

    Id lose the 4 way passive splitters as YeeZa suggests above...

    They reduce the signal quite a bit..... and when "daisy chained" like yours.... the loss is considerable.....

    A multi-way amplified splitter (with at least the number of outlets required) is definitely the go....

    Id say most of your problem is at the pointy end - the antenna. Direction is wrong, it is too low and check for corrosion, spider nests etc in the balun and also corrosion where the balun connects to the aerial terminals.
    Yeah they are cheapnnasty splitters. About that balun,.. From the ground,. I thought there was a balun there,.. but cant see one in the zoomed in pic. Where would it be? could this be in the roof ? if it is,.. I dont think Im small enough to get to that area. No biggy,.. it might be fine anyway,..and Ill do all the other things I need to do first anyway.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Remy,

    It should be right at the terminals on the aerial..... could even look like a slightly larger round connector on the end of the cable......

    Re the "rotated elements" referred to by Billi - some locations use vertical polarisation for VHF stations (the large elements) and horizontal for UHF (the small elements)..... so that part of the aerial is probably as it should be.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Billi link=1206260940/30#30 date=1206411018
    Hi Remy,
    Just a thought…TV signals are usually propagated horizontally and therefore the antenna should be horizontally mounted….from the photo you posted it looks as though the antenna has rolled into a vertical position (hard to tell from the photo though)
    Cheers
    Bruce
    Thanks Bruce, good point.. in the pic they do indeed look like they are vertical.. so I raced outside to check. But they are still parrallel to the ground horizontal (longer bits are vertical - shorter bits horizontal,.. same as all the neighbors aerials). I will make sure I keep them this way when I adjust it.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/30#32 date=1206411265
    Remy,

    It should be right at the terminals on the aerial..... could even look like a slightly larger round connector on the end of the cable......

    Re the "rotated elements" referred to by Billi - some locations use vertical polarisation for VHF stations (the large elements) and horizontal for UHF (the small elements)..... so that part of the aerial is probably as it should be.
    Aaar ok,.. off to have another look ::grabs binos and heads out in the rain 8-):: Oh yes!! there it is *::).
    [img]www.studioheath.com/images/bits/balun.jpg[/img]

    vertical polarisation for VHF stations (the large elements) and horizontal for UHF (the small elements).....
    Cool.. I didnt know that. *





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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Doing some shopping on the bay that shall not be named,... does this look ok?,...and what about the power source?? does it need one and if so how?




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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Remy,

    I think it is a passive splitter but passes power through to the seperate amplifier (generally called a masthead amplifier as it mounts on the er... masthead!!).....

    I assume that from the "all ports power pass"..... so you purchase a masthead amplifier (which gets its power up the coax which the signal comes down) and at one of the outlets you connect the special power box that sends the power up (via this splitter) to the amplifier..... it also has an outlet for the TV at that location.....

    Do I like masthead amps??...... nope!! If you are in a very weak signal area you have to have one..... but otherwise Id avoid them. You are feeding DC up the coax and any moisture etc will cause very rapid corrosion of the joints along the way (similar to car battery terminals)..... You also need to get a quality masthead amp if you go that way - the cheap ones often introduce some signal on the line from the 50hz power supply (which you see on the screen of the TV as a rolling faint horizontal bar)

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    OK,.. thanks JavaB,.. will keep looking. Could only find a 4way amplified with power source in the DSE online catalogue. Will ring them to see if they have an 8.

    Just got off the roof,..and have to go back up because my Rapid Wrench that I got for Xmas that fits hundreds of fasteners didnt aaaaaaaaaargh!. The ends of the U bolt prevented access to the nuts the way this wrench works ::) . OMG.. my heart is still racing.. will wait another 10mins and go again. There is nowhere to hang on. I have to wedge my right foot (which wont go all the way in) between the roof and the pergola and try and balance on that foot while messing with the aerial...the gutter as expected...wont hold jack.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Yeah, JavaBs on the ball, beat me to it mate.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Remy,

    An 8 way splitter is a pretty rare beastie..... the readily available ones seem to only go up to 4 way.

    The other thing you could explore is an in-line amp (not a masthead one) which has a built in power supply and feed that into an 8 way passive splitter similar to the one you found......

    Just as long as you arent running power on the coax it should be fine.

    And I hate working on the roof as well..... many years ago it wasnt a problem but Im not as agile as I used to be!

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    take two....failed again... I can get up and turn the aerial... but cannot keep a footing and reach up to the U bolt to heighten the darn thing. Theres just nowhere to hang on. grrrr. Gonna try to take the pole down from inside the courtyard,.. fix on pole at good height from roof, then refix to house. Whaaaaaaaa.

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Yeah, just be careful REMY, we want our CS member count going up not down!

    Been thinking about it, I think an inline amplifier (which youll need the power supply) with what youve got would do the trick.


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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by JavaB link=1206260940/30#39 date=1206491234
    Remy,
    The other thing you could explore is an in-line amp (not a masthead one) which has a built in power supply and feed that into an 8 way passive splitter similar to the one you found......

    Oh I should read all the previous posts before posting up ::)

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Thanks guys,.. well after take two and turning the aerial a tad,.. we have better reception,. but still not great...still one channel missing on my PC tuner and its very poor on the TV... one bar on the reception scale via PC for a moment there,. now none and channel gone again. *

    Looking at the aerial height in relation to the roof while I was up there,.. I was able to see exactly whether it clears the crest of the roof,..and it doesnt at all atm. *I suspect that even if I move the aerial up the pole as far as I can fix it,.. part of the aerial will still be below the crest of the roof,. those horizontal elements particularly I think will still be below. *

    Sooooooh,.. since Im going to pull the pole right off the house (which will also give me the added advantage of checking everything over properly without fear of hitting concrete fast..at least not from the top of the roof,I had a laugh)...I might as well get a longer pole. Does anyone know where I can get one of these from?

    EDITED TO ADD: just realised it is the UHF channels that Im either getting poorly or not at all... the horizontals. ;D

  45. #45
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Remy link=1206260940/30#43 date=1206493316
    EDITED TO ADD: just realised it is the UHF channels that Im either getting poorly or not at all... the horizontals. ;D
    UHF is considered to be a LOS (Line Of Sight) frequency range while VHF is over the horizon capable. If the transmitting antenna for the UHF channels is over the horizon to you no matter what you do you may not be able to get a good quality signal. The only thing you can do in that case is increase the height of the pole. Preferably until your antenna has LOS to the transmitter.


    Java "Once upon a time was a radiohead" phile

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Javaphile link=1206260940/30#44 date=1206573256
    Quote Originally Posted by Remy link=1206260940/30#43 date=1206493316
    EDITED TO ADD: just realised it is the UHF channels that Im either getting poorly or not at all... the horizontals. *;D
    UHF is considered to be a LOS (Line Of Sight) frequency range while VHF is over the horizon capable. If the transmitting antenna for the UHF channels is over the horizon to you no matter what you do you may not be able to get a good quality signal. The only thing you can do in that case is increase the height of the pole. Preferably until your antenna has LOS to the transmitter.


    Java "Once upon a time was a radiohead" phile
    Awesome!!! and I am very happy to report..I just walked in the door only moments ago,..with a lonnnnnng antenna pole.. [smiley=thumbsup.gif] ;D * I decided to check out my local junk yard and after 20mins without finding any aerial bits whatsoever and giving up the search,..on my way out ..from the corner of my eye I spied a nice long pole leaning against the side wall of the massive junk storage shed. It had been squirreld away in a secured area with Strictly No Entry to Public sign. *>:(. So after an equiry,..which required the guy to ring and get permission to sell it(another 10+ mins wait ) and YES! I have myself an new pole for $5!! that is probably at least 600mm longer than the one up there now. So looks like I might be able to fix it approx 750mm in total higher....whoooot!!!!. *That will definitely clear the crest of the roof,.. and I can see the tower from here, so if all goes well...I could have a win with this.

    Just have to figure out now..how to get up there again and do it. Obviously this was installed before the metal roof,.and the guy must have had the roof cavity to stand in,. times like this,..a regular pitch and/or tiled roof would be noice,.. would be good if I could just lift a tile or two to get some kind of hold in the rafters ::). * My husband suggested I could try and detach the pole from within the courtyard, but on closer inspection,. even if I was standing on the very top of a double length ladder,. I dont think I could reach it..a few feet too short me thinks. *oooh ooh...I just had a brain wave :o ,.. my husband and I used to abseil a lot..whaahahaha *thats it!!... from inside the courtyard and walk up the wall *snort*. Im gunna suggest this to hubby and see what he reckons. Could even be fun whaahaaha.

  47. #47
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Another consideration is the effect of your roof on your signal. A metal roof will act as a giant radio wave reflector. With the house antenna pointing across the roof to the transmitting antenna you may very likely end up with ghosting issues.

    Looking at the picture of the antennas location this will hopefully be a minimal issue. Because of the 1:1 slope of your roof and the transmitting antenna being higher most of the reflected radio waves will not reflect towards your antenna.

    If ghosting is an issue (and all other sources have been checked out as the cause) try lowering the antenna until it just barely clears the peak of the roof. The higher the antenna, the more it will be effected by reflected radio waves. If that doesnt work then youd probably be looking at having to move the antennas location to the end of the house nearest the transmitter so that it doesnt overlook the roof.


    Java "Isnt electronics fun!" phile

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Javaphile link=1206260940/45#46 date=1206581489
    Another consideration is the effect of your roof on your signal. A metal roof will act as a giant radio wave reflector. With the house antenna pointing across the roof to the transmitting antenna you may very likely end up with ghosting issues.

    Looking at the picture of the antennas location this will hopefully be a minimal issue. Because of the 1:1 slope of your roof and the transmitting antenna being higher most of the reflected radio waves will not reflect towards your antenna.

    If ghosting is an issue (and all other sources have been checked out as the cause) try lowering the antenna until it just barely clears the peak of the roof. The higher the antenna, the more it will be effected by reflected radio waves. If that doesnt work then youd probably be looking at having to move the antennas location to the end of the house nearest the transmitter so that it doesnt overlook the roof.


    Java "Isnt electronics fun!" phile
    Dont tell me this,... I just spent a whopping $5 on the longer pole. I was so proud of my hunting/gathering/bargaining skills............*snif*

  49. #49
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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by Remy link=1206260940/45#47 date=1206586421
    Quote Originally Posted by Javaphile link=1206260940/45#46 date=1206581489
    Another consideration is the effect of your roof on your signal. A metal roof will act as a giant radio wave reflector. With the house antenna pointing across the roof to the transmitting antenna you may very likely end up with ghosting issues.

    Looking at the picture of the antennas location this will hopefully be a minimal issue. Because of the 1:1 slope of your roof and the transmitting antenna being higher most of the reflected radio waves will not reflect towards your antenna.

    If ghosting is an issue (and all other sources have been checked out as the cause) try lowering the antenna until it just barely clears the peak of the roof. The higher the antenna, the more it will be effected by reflected radio waves. If that doesnt work then youd probably be looking at having to move the antennas location to the end of the house nearest the transmitter so that it doesnt overlook the roof.


    Java "Isnt electronics fun!" phile
    Dont tell me this,... I just spent a whopping $5 on the longer pole. I was so proud of my hunting/gathering/bargaining skills............*snif*
    You can always cut it ;)

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    Re: TV Aerials, HD STBs, HD DVB-T Receivers, SAT T

    Quote Originally Posted by YeeZa link=1206260940/45#48 date=1206592783
    You can always cut it ;)
    ::gives YeeZa the evil eye::
    [img]www.studioheath.com/images/bits/evli.jpg[/img]



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