Radford STA25 Mk 3 modifiactions
On Tuesday, September 3, 2019 at 4:10:54 PM UTC-4, Peter Wieck wrote:
We have apples: "Good working order".
And we have Oranges: "Of course it's a very old amp...".
That it was only a capacitor is remarkable.
That the amp was modified is, likely, a contributing factor.
That it's made by Radford is at least as likely a factor.
In the 1970's I was an authorized service center for Radford
and made, at the time, a fair piece of change repairing their
stuff under warranty. That is until they decided to stop paying
for warranty repairs altogether. And, at that point, I stopped
accepting Radford product for warranty repairs: I'd be damned if
I was going to eat their problems.
The biggest issues were failed power supply capacitors and,
strangely enough, failed power supply transformers. There
was no apparent correlation between the two: Lots of caps
went nova, and two or three transformers went as well: but
in those cases, the caps were okay.
Beyond that, almost every one of the Radford preamps I
encountered has bad pots (all noisy, several with dead
spots).
Not the most confidence-inspiring product line, to be sure.
Best of luck!
Indeed!
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