life span/failure rate of filter capacitors?
(And I assume that the filter caps are the large electrolytic caps with the screw in terminals?)
The reason I am inquiring about this subject is that I stumbled on to an older thread started by someone who had a "filter cap explode" inside his 20 year old Cary V-12 monoblock. (Which is basically what I have, only mine is a single stereo amp.)
Anyway, I do know the specs on those large caps with the screw in terminals which I am thinking are aka filter caps are 560uf 400v.
Do these normally give any kind of warning before they let go? It does occasionally blow the 3A SB AC power fuse on start up.
TIA for any information/advice on this subject.
@jasonbourne52 Wrote:
I agree! I bought my Luxman B-12 mono block amps new in 1977, the two main filter capacitors were 15,000uf 63 Volts and lasted 30+ years. And were up to spec when I sold them. If you are occasionally blowing a fuse, my advice would be to send the amp to Cary Audio and have them check it out. 😎 Mike
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Something i do not agree is changing the temperature specs on vintage equipment. If at 85 deg replace with same rating, and check to improve in other areas as voltage, tan δ, esr, etc ( depending on position) Last, why should a higher temperature rating be more expensive? The truth is that after 20 years you maybe on the edge, and say maybe because i believe that good quality caps can last a very long time.
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Thanks all. @ditusa , @arcticdeth , this is the thread that got me thinking about the subject
and after reading this thread, and a couple of quite recent threads related to the SLP-05, I don't think I want to send anything back to Cary for any reason. A couple of years ago I took the bottom off of my V-12 to change the coupling caps, and from the looks of it, I wasn't thinking that the filter caps would be too bad a job, And I was thinking I could probably get some from Partsconnexion? I remember at the time, someone from another forum (AA) was helping me troubleshoot (via email) the signal caps and his opinion was that the large electrolytic caps were not a common part to fail. So I kind of put it out of sight/out of mind. Until I read that thread that I pasted above. |
When I had my Cary amps, I was able to successfully undertake all repairs/upgrades with direct help from Dennis Had, great guy. I know he's no longer affiliated with company so perhaps not so great on servicing his designs?
I'd go for the diy route on those caps, as I recall my SLM's, shouldn't be that difficult. I deal with Partsconnexion quite often, very good supplier. You may also find the caps you need from places like Mouser, Allied. |
