I have clicking, but it doesn't following the keying. (Maybe you meant
AFTER keying.) It happens after a long transmission...for the most
part. It has to do with flexing of the heatsink or other parts of the
chassis when the unit heats and cools. I believe it's been covered here
before.
Joe ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On 12/29/2014 4:58 PM, Wes (N7WS) wrote:
I'm a relatively new owner of a KPA500. I'm also, thanks to the new
K3 firmware, using QSK for the first time in my ham career.
These two facts have led to me hearing a slight clicking noise
emanating from the amp that follows the keying. This is unrelated to
drive or output power, since it happens in the TX Test mode too. I
understand that PIN diodes are used for RF switching but it still
sounds like a reed relay to me.
Any explanation? (Hint) Having a schematic would probably make this
self explanatory.
Wes N7WS
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