TRANSMITTERS & TRANSCEIVERS

Type 39 Transmitter

DATE OF DESIGN

FREQUENCY RANGE

M/F = 100-500 kc/s: H/F = 7500-16700 kc/s.

POWER SUPPLIES

220V DC fed alternator with a 20kW output, 500 c/s, 300V AC

POWER TO FINAL STAGE.

RANGE IN MILES

TYPE OF SET (VALVES USED)

WAVEFORM

METHOD OF PRODUCING OSCILLATIONS

WHERE USED/FITTED

The Type 39 was an experimental set, so was known as the Type 39X. It came in two forms {both Valve} as [A] 1 Panel with an M/F only transmitter, and (B) 1 Panel with both an H/F and M/F transmitter.

It was fitted into Submarines Oberon, Otway and Oxley only and all three boats got the [A] and [B] packages. When the (A) package was being used, the M/F transmitter was of high power and achieved ranges of 600 miles - it required a 220V DC fed alternator with a 20kW output, 500 c/s, 300V AC. When package (B) was in use, it was classed as low/medium power, the M/F part achieving a range of 150 miles and the H/F part potentially world wide at times but nominally 50 miles - it required a 220V DC fed alternator with a 3kW output, 500 c/s, 150/200V AC. With only one submarine aerial, only one configuration could be used at any one time. Emissions for package (A) were CW and ICW, and for package (B), ICW only.

Frequency range M/F = 100-500 kc/s: H/F = 7500-16700 kc/s. Note the high starting frequency of the H/F transmitter!

ASSOCIATED WAVEMETER

FURTHER READING

IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.

NOTES.