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Old 17th May 2004, 07:04 PM   #1
SY is offline SY  United States
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Default My thanks to Nelson Pass

My Adcom 555 is nearly twenty years old now. It's been servoed, returned to original. Converted to direct coupled, returned to original. Regulated, then returned to original. Driven cones, ribbons, and electrostatics. Played for hours every day. Used as a PA amp at my first wedding. Used as a test amp for speaker driver measurements. Used as a high power low frequency source for driver break-in. Followed me through four houses, two wives, seven cats, three jobs.

All it's ever done is work and sound good. Maybe not your fanciest design, but there's something to be said for solidity and reliability.
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Old 17th May 2004, 09:48 PM   #2
Magura is offline Magura  Denmark
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Out of curiousity. Wich caps have been used for the PSU?
Im asking cause like 20 years+ service live is rather good with that many hours on it.

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Old 17th May 2004, 09:52 PM   #3
SY is offline SY  United States
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Whatever came stock with the amp. I'll look at them tonight and see what the brand is.
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Old 18th May 2004, 10:53 AM   #4
Jay is offline Jay  Indonesia
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Damn. I can't imagine that there must be something to do between Adcom and Nelson Pass
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Old 18th May 2004, 09:53 PM   #5
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Hi,

Quote:
Im asking cause like 20 years+ service live is rather good with that many hours on it.
It's not the hours of use that kills the electrolytic caps, it's the hours they're not in use.

Still, 20 years is pretty good in anyone's book.

Cheers,
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Old 18th May 2004, 11:11 PM   #6
Variac is offline Variac  United States
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Jay,

I believe that Adcom's current best preamp is a NP circuit.
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Old 19th May 2004, 01:39 AM   #7
SY is offline SY  United States
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Default 20 yr old electrolytics

Foiled again; the caps are just marked "Adcom." They're blue, if that helps.

Maybe NP can tell us?
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Old 19th May 2004, 01:47 AM   #8
Magura is offline Magura  Denmark
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Default Re: 20 yr old electrolytics

Quote:
Originally posted by SY
Foiled again; the caps are just marked "Adcom." They're blue, if that helps.


Thanks for checking anyway...a pity we cant tell wich caps it is, just imagine if they were dirt cheap


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