TYPE 83 P


TYPE 83 TRANSMITTER


DATE OF DESIGN 1923
FREQUENCY RANGE 2300 -4200 kc/s
POWER SUPPLY 1 kW Double Generator
TYPE OF SET VALVE
WAVEFORM RT and ICW
METHOD OF PRODUCING OSCILLATIONS SELF
WHERE USED/FITTED Type 83 has a range of 20 miles. It is a low power valve set designed  for use either as a W/T or R/T transmitter. The complete set, with the exception of the generator and automatic starter, is secured to a metal framework which also supports an inclined board on which the receiving instruments are mounted. 'Sorbo' rubber pads are used to support the transmitter as a protection against vibration and shock of gun-fire. Click here for an OED [Oxford English Dictionary] definition of what 'sorbo' is Click to enlarge

This is one of the several sets which had a 'listen through' facility when using ICW allowing ships to "break-in" on transmissions.

This set is capable of being keyed [ICW] from the main W/T office, or for R/T, to have two microphones connected, one in the W/T Office and one on the bridge of the ship. The W/T operator has a control box on which is a switch marked "RC-OP" meaning 'Remote Control-Operator'.  Further, each position has a R/T-Local switch. If, say, the bridge wanted to talk on the set, the W/T operator would select 'RC' and the bridge operator would set his switch to R/T thereby denying the W/T operator the use of the set.  Both position can talk to each other over a battery dry-pack powered internal circuit, by each position switching to their 'local' modes.

ASSOCIATED WAVEMETER 1492B or G9
SMALL SCHEMATIC

Click for the full set schematic 83 overall system diagram.pdf

and here to see the Equivalent circuits for R/T and W/T

PHOTOGRAPHS