|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
74.92.45.17
I have a bunch old stuff,but very nice , but I am hearing light bubbling or popping sounds out of the speakers. Is that the sound of old, dried out, bad capacitors?My Sony STR 6200F receiver is 40 years old, Adcom 545 GFA amp 25 years old and my speakers about 10years old. Thanks,Chet
Follow Ups:
Most modern electrolytics have a life expectancy of about 7 years. Computer grade types, with the screw top terminals, have a life expectancy of 15 years, at least according to old Sprague manuals I have. Your electronics are due for a replacement of the power supply caps.
Electrolytics are designed to be self healing, which means as their wetting fluid evaporates and the surfaces arc, they blow a hole and the capacitor sort of reforms through the short ( probably the popping noises you hear). Change out the main power supply caps first and then work forward, as the caps immediately after the rectifiers absorb most of the surge.
Stu
Pass claims a longer lifespan.
Heat is the #1 killer, of course. Caps should be rated for much higher temps than they will ever encounter. Have I seen 105c rated?
And don't forget the temp induced voltage derate.
None of the means the caps in your oldest piece are not dead or dying....
Too much is never enough
Borrow (or buy) an ESR meter and check them properly.
The Sony may be of a vintage when they actually FIXED stuff. You may want to take it to a fixit guy and get an estimate. I'm surprised the cans haven't exploded on 'ya.
The Adcom? Also nearing the useful life time of its caps. While you are dragging the Sony around, I'd consider bringing the Adcom along to keep it company.
If you are the handy sort, and have the basic kit (iron workstation, solder wick, solder, magnifier and a selection of hand tools) the PS caps are perhaps the easiest part to change. My old Carver Cube was like a Chinese Puzzle Box and a mechanical nightmare, but the Adcom and maybe the Sony should be pretty straightforward.
Too much is never enough
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: