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Post by leonski on Mar 31, 2015 11:44:14 GMT -5
Here is an article for NON-Engineers concerning Electromigration. Sorry, folks, SS DOES wear out and this is one mechanism. Engineers design a safety margin into all devices for 'lifetime' reasons. www.engr.sjsu.edu/mjones/ee227/electromig.pdfAND…..a 1 page explanation of temperature dependance in a BiPolar transistor. Other SS devices will have similar characteristics. As the part heats it changes in Measurable ways. The Best amp designers USE this to make their gear sound best after a short time ON and being used. ecee.colorado.edu/~bart/book/book/chapter5/pdf/ch5_4_5.pdfAs for bench testing? That is expensive to burn-in EVERY piece. As far as I know, Bryston does this. A characteristic of ALL things built by man is 'infant mortality' where SOMETIMES a built thing just doesn't work right. In fact, it may last for a few minutes or hours to a couple days. When I started up a NEW Wafer Fab, we had representitives from EVERY major piece of equipment on-site to keep things going. As things were repaired they got better. Finally, all the equipment had settled in and failed at a very low rate. And our in-house maintenance could easily keep up AND do preventive maintenance so unexpected failures were diminished. But that initial bump when new? horrible.
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Post by 405x5 on Mar 31, 2015 13:02:45 GMT -5
"Sorry, folks, SS DOES wear out and .........." Yes yes, and blah blah blah..............all good reading and such but YOU refuse to read the original post. Rather, you prefer to go into Never Never land.
You state the obvious.....yes OF COURSE, solid state components and everything else can and does wear out over time. We don't need to be "educated" or lectured by you about that. This is a thread about whether or not amplifiers, as a finished component require a break in period to achieve a maximum sound potential. That's all it is! Now, if you want to go back again and talk about the weather in Ethiopia like you've been doing.....well that's fine by me ZZZZZZZZZZZZZZZ.....!
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Post by garbulky on Mar 31, 2015 16:34:16 GMT -5
"Sorry, folks, SS DOES wear out and .........." Yes yes, and blah blah blah..............all good reading and such but YOU refuse to read the original post. Rather, you prefer to go into Never Never land.
You state the obvious.....yes OF COURSE, solid state components and everything else can and does wear out over time. We don't need to be "educated" or lectured by you about that. This is a thread about whether or not amplifiers, as a finished component require a break in period to achieve a maximum sound potential. That's all it is! Now, if you want to go back again and talk about the weather in Ethiopia like you've been doing.....well that's fine by me ZZZZZZZZZZZZZZZ.....!
The relevant bit to "break in" is related to temperature which he talked about. AND…..a 1 page explanation of temperature dependance in a BiPolar transistor. Other SS devices will have similar characteristics. As the part heats it changes in Measurable ways. The Best amp designers USE this to make their gear sound best after a short time ON and being used. ecee.colorado.edu/~bart/book/book/chapter5/pdf/ch5_4_5.pdf
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Post by 405x5 on Mar 31, 2015 21:07:57 GMT -5
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Post by leonski on Apr 5, 2015 1:19:49 GMT -5
405? You don't get out much, do you? Short answer: Caps break in. PS caps might be 'worst'. Dielectrics have some kind of effect on this, but the physics starts getting weird. My Panels showed some pretty strange effects when new out of the box and I can ONLY ascribe what I heard to capacitor 'forming'. SS has a short break in period, too. Integrated circuits will have small amounts of capactitance built-in, as well as other insulation between layers and conductors. Those insulators MAY be subject to break in as well. Electrons may migrate VERY slowly thru such insulation. see Tunnel Diode for some information on this. My OPINION is that MOST break in of ALL gear is done within 10 to 20 hours of initial turn on and LOADING thru use. Other effects I tend to think of as related to YOU getting used to the SOUND, not the SOUND changing to match whatever YOU think it should be.
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Post by 405x5 on Apr 5, 2015 8:54:37 GMT -5
405? You don't get out much, do you? Short answer: Caps break in. PS caps..................
Just babble on and on and on ad nauseam, sir whatever floats your boat. This thread is as dead as a doornail and nobodys bothering with it except you!
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Post by Cogito on Apr 5, 2015 9:14:50 GMT -5
ANY audio electronics that AUDIBLY change after a handful(or hundreds)of hours of use are quite simply, POORLY designed. Well engineered products should give CONSISTENT performance from the first hour to the thousandth hour of use. Tube products may be the expected exception to this however and one of the reasons I don't do glass.
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Post by leonski on Apr 5, 2015 13:26:44 GMT -5
All I can say is LOTS of people disagree. I think it's a little nutty, too, after hearing claims of sometimes HUNDREDS of hours for break-in. I don't think ANYONE has ever demonstrated that kind of 'sound memory'.
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