[Milsurplus] Powering a GP (long)

[Richard Brunner]

Jack Antonio wrote:
......> The second problem concerns the compensating capacitance switches
> on the transmitter. They are to be adjusted for no change in filament
> voltage when keying the transmitter, the best I can get is a half volt
> drop. I can attribute some of this to the variac voltage dropping, but
> not all. I don't know if this is due to the inline variac or not,.....

If the PE-206 inverter has a carbon pile regulator like the 800-1 
inverter, connect the feedback line between the compensating capacitor 
and the load.  The GO-9 has this connection brought out, labeled "F," 
without comment.  I brought it out on my TBW, and regulation improved to 
about 0.2 volt from 0.5 volt.  Theoretically, when reactance is 
neutralized it disappears and it shouldn't make any difference, but in 
reality it does.  If the PE-206 has saturating poles and is 
self-regulating, you have a problem with the variac impedance.

See http://aafradio.org/index.htm om Mike Hanz's web site for 
information on the 800-1 and carbon pile adjustment.

Richard Brunner, AA1P