[Elecraft] KPA100 oscillation -- NOT fixed

[Vic K2VCO]

I recently had the problem of the KPA100 oscillating on 7 MHz when 
connected to a particular (well matched and bead-choked) antenna with 
the KAT100 in line.  This happened with the improved shield and all KPA 
modifications installed prior to the 10/26/06 upgrade.

I installed the 10/26/06 upgrade and the problem went away.  However, 
now I have a new problem:  on 21 MHz, there is an intermittent 
oscillation when running 100w output.  It manifests itself as a loud 
'bzzzat' that's sometimes heard when the rig switches to receive, 
associated with lots of LEDs on the KAT100.  Dropping power to 70W seems 
to prevent it.

In the immortal words of General Halftrack, "Now What?"
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco