Transmitters & Transceivers

©RN Communications Branch Museum/Library

Type 623

	DATE OF DESIGN
	FREQUENCY RANGE		1.5 to 24 MHz in four bands.
	POWER SUPPLIES		115 V 60 Hz or 230 V 50 Hz 2.3 kW and 220 V d.c. 3A.
	RANGE IN MILES.
	TYPE OF SET (VALVES USED)
	WAVEFORM		CW.
	ASSOCIATED WAVEMETER.
	METHOD OF PRODUCING OSCILLATIONS
	WHERE USED/FITTED		Medium power HF communications transmitter for use in submarines to replace Type 55M.
	FURTHER READING
	PHOTOS, SCHEMATICS, DOCUMENTS		Details of Transmitter Type 623 Type 623 photograph
	NOTES.		BR 2181.