[Milsurplus] GF-11, #4381

[JOHNGRU@aol.com]

I have this transmitter ready to go on the air on 75 & 40 meter phone. The 
suppressor grid bias is such that the plate current is 50% of the plate 
current w/ the suppressor grid @ ground. The modulator output from the 
transformer is such that it's voltage will  swing the suppressor grid to 0 
volts (on positive voltage peaks) and nearly to plate current cut-off (on 
negative peaks).

Questions: info on the antenna used on the aircraft? i assume this was an 
"electrically short" antenna, because of the way the output circuit is 
designed. is this correct, and what is the approx. length of the antenna & 
feed line??

       functions of the 2 jacks on the side (for PL-68 size plugs): i 
understand the plate current jack, but why did they include the osc. plate 
current, too?  and the purpose of measuring the modulator plate current ???

       what voltage did the GF-11 use; the dynamotor output voltage/voltages? 
does anyone have any idea of the voltage ratings of the by-pass caps. 500 
volts too high on the 837s ??

       i will pay anyone for a copy (or for copying) of the GF-11 manual.

       i need a schematic diagram of the control box (CW-23097) and the 
interconnect between it and the transmitter.

sorry to be so "long winded" but any info will be sincerely appreciated, as 
well as a schedule on 3885 or 7290 Khz to check it out on the air..

many thanks, de john w4gqt