[Milsurplus] Pre-WWII Aircraft Radio Transmitters

[DeWitt Clay]

Here is some interesting info on the GO "Patrol Plane Transmitter" taken from 
a couple sizeable Navy student pamphets:
(1) copy of "Radio Materiel School" "Aircraft Radio",  Naval Research 
Laboratory, Anacostia Station, Washington, D.C., First Edition August 20, 
1936-covers early 

to mid 1930s aircraft radio equipment.
 
Chapter VII. Aircraft Transmitters 
"Model GO Aircraft Transmitting Equipment"  
I. Designed for service on patrol type seaplanes and similar craft 
II. Components: Power Unit Navy Type CHS 23026, High Frequency Transmitter Navy 
Type CHS 52020, Intermediate Frequency Transmitter Navy Type CHS 52021
III. MO-PA Design: (2) 860 tubes used in each transmitter (38160 Navy Type 
Number), (2) 866A tubes used in Power Unit (Navy Type Number 38166-A)
IV. Rated CW Power Out is 100 Watts into specified antennas over the ranges of 
300 to 600 KC and 4000 to 13,575 KC  at keying speeds up to 40 words per minute. 

20% modulated MCW is availible at 1600 cycles
CHS in the equipment type numbers indicates Sylvania was the contractor. 


(2) copy of "Aircraft Radio", Naval Technical Training Center, Ward Island, 
Corpus Cristi, Texas; Revised-date not given, original compiled December 1942
Chapter VI. Tranmitters
The GO-3 and GO-9 are given as representitive units of the GO series. The GO-3 
is discribed in some detail. Manufacture by Westinghouse. They are quite similar 
in design and appearence.

Chapter VI. Transmitters
"GO-3 Transmitter"
Components: Rectifier, High Frequency Transmitter, Intermediate Frequency 
Transmitter
Tube Complement: 801, 837, 803, 5Z3, (2) 866A
MO-IPA-PA Design: 801 Master Oscillator, 837 Intermediate Power Amplifier, 803 
Power Amplifier
Same tube line up for both IF and HF Radio Transmitters.
Rated CW Power Output is 125 Watts
Frequency Coverage of 300-600 KC and 3000 to 13,575 KC
Keying Speed up to 25 words per minite-factory setting for keying relay
MCW 800 cycle modulation at reduced output
 
"GO-9 Transmitter"
Intermediate Frequency Transmitter: 801 MO, 837 IPA, 803 PA
High Frequency Transmitter: MO 837, 837 IPA, 803 PA
Rectifier Unit: (2) 38267 (1616), 38593 (5Z3); Note change of HV rectifiers from 

MV 866A to HV 1616 tubes.
Frequency Coverage; 300-600 KC and 3000 KC to 18,100 KC
Power Output CW 125 Watts, 100 Watts at higher Frequencies (13000 to 18100) to 
specified trailing antennas.
 
 
73, DeWitt  N4QNX