[Johnson] Start of New Year

[Bill Cromwell]

Hi David,

I don't know what 'zsac' is but the first thing I would be looking for 
(if I understand correctly what you are saying) is defective coax jumper 
cable somewhere outside of the transmitter. I have had that happen in my 
station a couple of times. It's the easiest part to check. Good luck 
with repair project.

Happy New Year

73,

Bill  KU8H


On 01/01/2015 10:24 AM, David C. Hallam wrote:
>
>
> Yes the grid current does vary when I increase the drive.  In the CW 
> position  I get about 600 mA of plate current.  With the PA tuning I 
> can dip to to about 40 mA with no indication of output on my monitor 
> scope.  All of this leads me to believe the problem lies in the PA 
> tuning/loading circuit.  In the SSB position the zsac does not change 
> from about 220 mA when I apply audio drive from the exciter.
>
> David
> KW4DH
>