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Photograph 060920 Second World War, 1939-1945MELBOURNE, VIC. 1943-12-06. EMERGENCY KEYING EQUIPMENT AT LAND HEADQUARTERS HEAVY WIRELESS GROUP.

The Australian War Memorial Collection. Test site
MELBOURNE, VIC. 1943-12-06. LINE DISTRIBUTION AND NORMAL KEYING EQUIPMENT AT LAND HEADQUARTERS HEAVY WIRELESS GROUP.
MELBOURNE, VIC. 1943-12-06. EMERGENCY KEYING EQUIPMENT AT LAND HEADQUARTERS HEAVY WIRELESS GROUP.

MELBOURNE, VIC. 1943-12-06. VF346658 SERGEANT D. TREDWELL OF LAND HEADQUARTERS HEAVY WIRELESS GROUP, OPERATING HIGH SPEED EQUIPMENT WHICH PREPARES TAPE FOR TRANSMITTING OVERSEAS MESSAGES.

MELBOURNE, VIC. 1943-12-08. SIGNALMAN R. RILEY (1) AND CORPORAL ALCOCK (2) TRANSMITTING MESSAGES AT LAND HEADQUARTERS HEAVY WIRELESS GROUP.

RINGWOOD NORTH, VIC. 1943-05-04. "PLAYBACK" UNIT FOR CONVERTING HIGH SPEED WIRELESS TELEGRAPHY TRANSMISSIONS TO NORMAL SPEEDS. THE OPERATOR IS SIGNALMAN H.F. BUSSELL OF LAND HEADQUARTERS HEAVY WIRELES

HOBART, TAS. 1943-04-18. V19883, CORPORAL S. DONOVAN, OF LAND HEADQUARTERS HEAVY WIRELESS GROUP AT THE HAND KEYING AND RECEIVING SET USED FOR INTERSTATE COMMUNICATIONS. HE IS OPERATING FROM TASMANIA L

RINGWOOD NORTH, VIC. 1943-05-11. COMMERCIALLY BUILT ULTRA HIGH FREQUENCY TRANSMITTERS (FREQUENCY MODULATED), USED BY LAND HEADQUARTERS HEAVY WIRELESS GROUP AS KEYING LINKS BETWEEN THE OPERATING ROOM A
