|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
71.50.29.73
In Reply to: RE: How Long do Caps last in a 45 SET Amp................. posted by Cut-Throat on May 28, 2015 at 13:02:28
You probably need to leave it alone !!!
Best procedure would be some test equipment to check each cap in the
circuit. ( There were ESR meters, for in-circuit testing, two decades ago, likely still today, maybe improved models ). ONLY then, can you know, really know, if there are any needing replacing.
If you replace caps, the amp's sound will likely change, not necessarily for the better.
We have worked extensively with certain solid state receivers, from 1976 ( 39 years old ). In some instances, ALL the caps we pulled out to replace - tested like NEW. In some instances, when we willy-nilly replaced a stock cap with a new one, the "magic" of the piece went TOTALLY away.
So, I would think any quality cap, not run at the edge, would be good for 2 to 3 decades, easily.
Of course, if the amp wasn't built well to start with, that is a whole other can of worms !!!
Jeff Medwin
Follow Ups:
This is the tool I had a Bob Parker one...need to find it !!
I was using my cap meter the other day thinking I was just wasting my time. Testing them tells very little. An ESR gives so much more and really isn't expensive and there is even a kit option.
E
T
And, you test the caps while they are in circuit. I have a old Bob Parker and a Blue AnaTek. Prefer the "EA" Bob Parker of the two. Discontinued alas, but there is the copy from Portugal.
I built the EVB and also really like it.
The article you linked mentions an analog multimeter as an important tool to have. I've been getting by just fine with my DVM. Do you know why one would also need an analog multimeter?
"Do you know why one would also need an analog multimeter?"
Short term trends, i.e. pulsating DC voltage or current.
--------------------------
Buy Chinese. Bury freedom.
Thank you, makes sense.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: