[TenTec] Corsair II buzz

[Gary Smith]

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 
headphones clearly.

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.

Gary
KA1J

> 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 
> engaged.
> 
> 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?
> 
> Thanks!
> 
> Gary
> KA1J
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