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Eureka Mignon Upgrade

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  • Thunder240
    replied
    OP, how does your new Specialitta compare? Assuming it’s less clumpy (as advertised), do you, or does anyone, know why?

    I seem to be cursed with the same clumping from my Eureka Mignon as OP when grinding for espresso, since Day 1. When grinding coarser, for cold brew say, the clumpiness goes away, but it comes back when I tighten the grind back for espresso. If I loosen the grind enough to stop the clumpiness, I’ve got a grind that’s way too loose for espresso.

    Ive cleaned the guide chute and all areas accessible with top burr removed many times. Admittedly, I haven’t cleaned underneath the bottom burr (will try that soon). My beans are always less than two weeks old. Which is to say, OP’s experience may not be common, but it isn’t unheard of either. I wonder if there are more Mignon owners out there with experiences like ours?

    I can’t account for these drastically different owner experiences, except to say that perhaps it’s a quality control issue? When I called the dealer, I was told the behavior is normal on fine grind settings. I spoke to a different dealer who cautioned me that the Mignon is known to be a clumpy grinder, which is interesting given the mostly satisfied reviews.

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  • Silentj
    replied
    Ended up going with the Eureka Specialita. Very happy with this decision, whilst I'm sure there are higher end grinders, this is a definite upgrade on the old mignon as far as taste in the cup goes. Not too mention significantly quieter and much less clumpy. Very happy!

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  • level3ninja
    replied
    Originally posted by Caffeinator View Post
    The Fausto is a more logical competitor to the Atom 65 which seems not to come to Australia. The Faustino is a new grinder which appears to be based on Mignon.
    My mistake, I hadn't realised the Faustino was actually a thing now. When the Fausto came out there were a few autocorrects to Faustino so I assumed that was still the case. That being said I still can't find any mention of the Faustino having any silencing.

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  • Caffeinator
    replied
    Originally posted by level3ninja View Post
    I found a little bit on the idrinkcoffee page about the Fausto.
    The Fausto is a more logical competitor to the Atom 65 which seems not to come to Australia. The Faustino is a new grinder which appears to be based on Mignon.

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  • Lyrebird
    replied
    Originally posted by level3ninja View Post
    I thought it doubled/halved every 10dB, so 20dB would be 75% reduction in power?
    No, it roughly halves for 3 dB since the log10 of 2 is very close to 0.3 (it's about 0.3010). If you can do powers / logs in your head*, the easy thing to remember is that 2^10 is about 10^3 (actually 1024).


    * yes, I'm one of those weirdos.

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  • Lyrebird
    replied
    Originally posted by 338 View Post
    Sorry to go off topic, Lyrebird does that mean generally that say a grinder with 20db reduction would be 1% as loud as the original item?
    As measured, yes. To your ears, no.

    Acoustic response is logarithmic, it takes ten times as much power to increase the acoustic level by one Bel*, that being the definition of the unit. Since the Bel is fairly useless, we commonly use 1/10th of a Bel, a decibel.

    Your brain reinterprets this on a different perceptual scale, so you can hardly hear a difference of 1 dB. A 3 dB difference (very nearly half / double the power level) is perceived as small but significant. A 10 dB difference is obvious.

    A 20 dB difference is very obvious but the point in my post above is that such a difference is very, very difficult to achieve by damping / masking an existing source, you have to stop 99% of the acoustic power getting out. Most damping materials are simply not that efficient.


    * 1 Bel = the log base 10 of the ratio of powers, since 10^1 = 10, 1 Bel is a ratio of 10:1, since 10^2 = 100, 2 Bel is a ratio of 100:1. The unit was named for Alexander Graham Bell but with the last "l" left off, I don't know why. The only other SI unit I can think of where they don't complete the name is the Poise (a unit of viscosity) but that's because no-one can pronounce Poiseuille.
    Last edited by Lyrebird; 22 April 2019, 12:24 AM.

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  • TroubleBrewing
    replied
    Originally posted by Dimal View Post
    20dB is a hell of a reduction, would be interesting to see how this was done and how the 'improvement' was measured...

    Mal.
    My guess is from the next room over... 20db is so massive a shift I the noise floor I can't help but be more than a little skeptical

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  • level3ninja
    replied
    I thought it doubled/halved every 10dB, so 20dB would be 75% reduction in power?

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  • level3ninja
    replied
    I recently had a Mahlkoenig Vario in the house which I bought from a fellow snobber for my brother in law. While it was here I took the opportunity to test it against my Breville BCG820 and my Eureka Atom. I used my most scientific cat scratching post to rest my phone with an uncalibrated decibel meter app. I found the Vario and the Smart Grinder to be very similar, and the Atom to be about 10dB less than both of them.

    Click image for larger version

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  • 338
    replied
    Sorry to go off topic, Lyrebird does that mean generally that say a grinder with 20db reduction would be 1% as loud as the original item?

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  • Lyrebird
    replied
    Yep, 99% reduction in acoustic power. Not easily achieved (BTW I used to work in the audio field, a very strong interest of mine waning as I slowly go deaf)

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  • Dimal
    replied
    20dB is a hell of a reduction, would be interesting to see how this was done and how the 'improvement' was measured...

    Mal.

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  • level3ninja
    replied
    I found a little bit on the idrinkcoffee page about the Fausto. It first calls it an Atom

    635 gram Hopper
    The Atom's uniquely designed hopper holds 635 grams or 1.4 lbs of whole beans.
    Then the only evidence they have for it being quiet is it's made by Eureka who make quiet grinders.

    Silent
    Designed by Rocket, the Fausto is manufactured by Eureka, a complany well known to produce grinders famous for their silent operation.

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  • level3ninja
    replied
    That's a quote from websites about the Eureka grinders, I can't find reference to it in relation to the Rocket.

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  • Caffeinator
    replied
    Originally posted by level3ninja View Post
    Unless something has changed since it came out it doesn't have any sort of silencing like the Eurekas.
    Rocket are claiming it does. Idrinkcoffee quotes:

    Silent Technology
    The exclusive anti-vibration solution reduces the grinding noise by approximately 20 dB compared to the conventional grinders and paves the way for a new way of grinding coffee: accurate and quiet.

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