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In Reply to: RE: Post this in the amp forum? posted by Lt Einhorn on January 19, 2015 at 13:37:59
UNUSED PS Caps tend to go south in a matter of years. They'll ZAP when hit with full line voltage and power. It is simply physics and chemistry.
Most techs recommend bringing amps which have SAT for years up on a variac. Those kinds of caps have NOT changed in Decades.
Pass is on record as saying how long PS caps last in regular use. 20 or 30 years, IIRC.
Just sitting? No Way.
Too much is never enough
Follow Ups:
I understand what your saying. However I don't think sitting for 5 to 10 years is going to be an issue for equipment that is of this quality. I have a laptop that has Windows 95 on it. The thing sat unused for over 10yrs and it runs fine. The laptop is 25yrs old. Its full of old crappy electrolytic caps.
Not saying this couldn't d be a problem but its highly unlikely IMO. Thankfully the amp is running great. Its dead silent. Only a short very quiet humm on initial power up as the caps charge up.
ALL those aluminum paste electrolytics are the SAME regardless of whatever.
They are up against some real physical limits and work best by being worked OFTEN.
Sitting is the WORST thing in the world for those big PS caps.
Don't believe me. Most techs would even recommend a piece of gear with such caps that has sat for YEARS be first energized with a variac so the caps have a chance to reform before getting hit with full line voltage.
Check out this link for info from prime manufacturers of Aluminum PS Caps.
Too much is never enough
You linked me to a "page that can't be found" and a .pdf that won't open LOL!
Thank you for your concern, but the amp works great. Rotel told me not to worry about the caps. Im not worried.
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