[Amps] AL-1200 Resting Current
Dana Roode
K6NR at ARRL.net
Fri Dec 12 19:08:10 EST 2003
Folks -
I finally got a chance to accurately measure the resting plate current on my
AL-1200 (See below) - its 12ma on CW (supposed to be 40) and 88 on SSB
(should be 150). Does this sound like bad Zeners?
Dana
Dana Roode wrote:
> Folks -
>
> My AL-1200 repair efforts continue. As you may recall, the parasitic
> suppresser came unsoldered and I had some sort of oscillation in the
> grid that took out the grid resistors, a resister in the grid meter, and
> my 756ProII. It turns out it also took out my ARB-704 relay buffer, and
> last weekend the grid meter mechanism itself gave up the ghost.
>
> Questions:
> - After replacing the grid resistors, the resting plate current seems
> too low, maybe half of what it should be. Is there an adjustment for
> this? I'm not sure why it would have changed.
> - I will order a new meter, should I put a diode across it to protect it
> in the future? What kind?
>
> Dana
>
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