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Old 17th May 2011, 02:18 AM   #171
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Anatech, if I understand you correctly, you want to know what relays I use? Well, sealed T-05 or plastic cased, gas filled relays. Gold to gold, silver underneath, copper under that. They work OK. Silver on silver switches are better. I don't use reed or mercury relays, power relays, or open relays for low level switching.
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Old 18th May 2011, 10:42 PM   #172
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Hi John,
Yeah, pretty much. We agree pretty closely on what to use for low signal levels. I have seen some power relays used for muting (what's that about?) by CJ. That's tube stuff.

The TO-5 cased relays are very expensive, but really reliable and cause less vibration. Good for high gain circuit areas. The gas filled are the only way to go in my book, contact plating and surfaces vary of course.

Do you use the higher coil voltage parts? I try to keep the coil current low and absorb any inductive kickback on de-energizing nicely (as in not suddenly as a straight diode will do).

I have never tried a mercury relay for anything. The effect of the mercury in saving contact wear sounds attractive, but the fact it uses a banned substance tends to restrict the use of these. I was very curious as to what you heard when trying these. Your subjective opinion has value since you do work at levels far better what can be acceptable to most people. Thoughts?

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Old 18th May 2011, 11:35 PM   #173
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Anatech, I have been using Teledyne T-05 sized relays since 1969. They work, they measure well, and they are designed to be reasonably reliable. That is why we used similar relays in the JC-80 preamp, and today in the Parasound JC-2, and the new Constellation phono preamps. They work, they work well, but IF and when I can, I think that silver on silver mil grade switches are best, and I sometimes use them.
Mercury tends to 'forgive' sound differences, but don't tell anybody, they won't believe me.
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Old 18th May 2011, 11:36 PM   #174
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Is this still a QP listening thread?
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Old 20th May 2011, 12:19 AM   #175
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Default I Smell BS...

Quote:
Originally Posted by Cal Weldon View Post
Is this still a QP listening thread?
How can it be if nobody is listening to QP's ?.

Eric.
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Old 20th May 2011, 04:29 AM   #176
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Patience Grasshopper. One more project to go before my interest will be piqued again.
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Old 20th May 2011, 05:28 AM   #177
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Quote:
Originally Posted by Cal Weldon View Post
Patience Grasshopper. One more project to go before my interest will be piqued again.
And then you wil have multiple systems to try it with....good.

Eric.
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Old 20th May 2011, 05:32 AM   #178
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Yes I am resurrecting something from the past so the Bybees will seem brand new to me.
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Old 9th September 2013, 03:48 AM   #179
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Quote:
I have, using some musical selections, comparing the Bybees to the cheap reference resistors. Other than a little burst of music at the beginning (comes from the time alignment process), I can't hear a thing when the difference files are played.
But was there a fairy dancing on the head of a pin when you were listening? I am surprised that you need to be told, given your background; please ensure your experiments are performed in controlled conditions or you will never get correct results.
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