Steve,
You bring out a couple of good points, so let me pick your brain if you
will:
In your experience, where does a supply decoupling fault usually show up in
a low Z solid state final. Do turn to turn shorts occur in the L, or are
bypass C's more often likely to fail?
Also, I have little experience working with chip caps, and only found bad
ones by probing at it while looking through a magnifying glass. I knew that
something was wrong and knew that it was highly likely the cap, but I didn't
know what a bad one looked like. When it flaked apart it was pretty apparent
that it was bad. But I imagine that one could damage a good cap that way
too. So could you explain in a little more detail what you look for as you
reflow the joints?
Thanks, Steve,
Jeff - K1LE - CT ><>
----- Original Message -----
From: "Steve Thompson" <g8gsq@qsl.net>
To: <AMPS@contesting.com>
Sent: Monday, November 25, 2002 5:14 AM
Subject: Re: [Amps] Solid state amp advice needed
> Another
> area to check is any r/l/c feedback round the transistors, and also the
> supply decoupling. Faults in either could cause destructive oscillation
under
> drive.
>
> A goos way to check chip caps is to reflow the joints, one end at a time.
> This usually shows up a broken component or detached metallisation.
>
> Steve
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