It was a half hearted attempt to have a 10-160M chokewithout series ham band
resonances. Obviously it has been overheated prior and changed value or was
always a bit undersize.
Replace and try again if the choke looks undamaged.
Carl
KM1H
----- Original Message -----
From: "Roger D Johnson" <n1rj@roadrunner.com>
To: "amps" <amps@contesting.com>
Sent: Tuesday, March 23, 2010 9:23 AM
Subject: [Amps] Drake L-7 problem
> This AM I was tuning up on 75m and there was a loud bang followed by the
> odor of burning circuit board. I found that the 47 pf PCB cap across part
> of
> the plate RF choke had burned through. This cap appears to be used only on
> the Drake amps that cover 160m but no explanation of it's purpose! Anyone
> know?
>
> 73, Roger
>
> --
> Remember the USS Liberty (AGTR-5)
> http://ussliberty.org/
>
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