128.48.9.89
In Reply to: RE: My Fisher 500c posted by jaybomb on October 22, 2009 at 04:46:29
Hi, Jay:
If you are attempting to revitalize your 500-C, you need to operate the set first by using a Variac. Too late for that, eh?
Those sets always need to have most of the original small value coupling capacitors and a bunch of small electrolytic capacitors replaced with fresh stock.
The power supply also needs routine upgrading.
This topic has been discussed so endlessly on this forum that I will not go any further with this discussion than to suggest that you look up all of those postings, many of which were my own.
I have worked on perhaps 20 or more of these sets over the past thirty-five years. I purchased a 500-C brand new when they first came onto the market and let me assure you of one thing: they all need work.
Do what is recommended and you will reap some major audio rewards as far as the listening experience goes.
Most of all, enjoy your purchases!
Lastly, I often use very thin wooden toothpicks to carefully treat and clean out the tube pin sockets on these sets, using DeOxiT and other products. Sparingly, of course!
You should also consider using traditional pipe cleaners to clean, burnish and treat any of the RCA connectors, from the inside.
The "U" shaped bridging connectors on the rear top of the set should ideally be removed, cleaned and the RCA-type sockets into which they sit, cleaned with pipecleaners soaked in contact cleaner, after which you simply reinsert the hoops.
Richard Links
Berkeley, CA
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