Thanks for the replies.
I have a slew of new ultra low ESR electrolytics and I feel more than
safe in exchanging the old ones with this newer technology and the
quality of these are mighty close to SMT caps. If I keep the pF & V
values the same I won't throw off any timing in the circuits.
I have noticed the "buzz" on several different power supplies
including a deep cycle battery. It's definitely not a hum but sounds
like something with odd harmonics, a definite buzz.
In fact, I was listening for key clicks using the Corsair with 6" of
wire stuck in its 239 while transmitting with a different rig and the
corsair was powered by a deep cycle battery, the other rig by an
analog Astron VS-35M and the Corsair & battery were in the middle of
the floor, 4' from anything else electronic and I heard it in the
Indeed the buzz is dependent on volume; no volume, no buzz.
I'd forgotten about the buzz, not using the Corsair for awhile now
till I used it to listen for those clicks.
> I've got a Corsair II I'm planning on recapping with Ultra Low ESR
> electrolytics. There's a high pitched buzz I can hear which is
> distracting somewhat but is mostly absent when the narrow filters are
> It was there when I sent it to the factory for repair several years
> ago and they found no problems but I notice it and it was not there
> on my Omni and is not there on my other radio (not a Corsair).
> Any suggestions of which board I might start replacing the caps on to
> eliminate this noise?
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