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-   -   My thanks to Nelson Pass (http://www.diyaudio.com/forums/everything-else/34207-my-thanks-nelson-pass.html)

SY 17th May 2004 07:04 PM

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.

Magura 17th May 2004 09:48 PM

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.

Magura:)

SY 17th May 2004 09:52 PM

Whatever came stock with the amp. I'll look at them tonight and see what the brand is.

Jay 18th May 2004 10:53 AM

Damn. I can't imagine that there must be something to do between Adcom and Nelson Pass :xeye:

fdegrove 18th May 2004 09:53 PM

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,;)

Variac 18th May 2004 11:11 PM

Jay,

I believe that Adcom's current best preamp is a NP circuit.:hot:

SY 19th May 2004 01:39 AM

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

Maybe NP can tell us?

Magura 19th May 2004 01:47 AM

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 :)


Magura:)


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