[BC] FM10K

[Milton R. Holladay Jr.]

What Curt said, plus these thoughts:

Bias voltage ?
The four top-hat bypass capacitors mounted to the tube socket ?  These are 
sometimes self-indicating by blowing apart.
Check every resistor you can access, especially on the side wall. Replace 
any defectives with some of higher wattage, as many of these are marginally 
rated..
Seven watts of drive should saturate the IPA grid. If more is required, 
there is something wrong ( keep in mind that earlier versions of this xmtr 
came with 10 watt exciters).
Pls report what you find........
M

----- Original Message ----- 
From: "Tom Taggart" <tpt at eurekanet.com>

[snip]> What I have now is IPA trouble. No drive to final, the transmitter 
will come up, but with a boatload of PA current, and no output (have Bird in 
line).  Only small amount of IPA cathode current.  >
> My main exciter did go out, too.  A Continental 802B, apparently blew the 
> Darlington--went to full power as they do when the Darlington fails in the 
> power control circuit.  Since it only takes about 15 watts to drive the