TYPE 51HX P

 

TYPE 51HX TRANSMITTER


DATE OF DESIGN 1931
FREQUENCY RANGE 1730 - 5500 kc/s
POWER SUPPLY Double purpose Generator 400V and 8V. See this file for power distribution and switching circuits [aerial, keying etc] 51 MAIN POWER DISTRIBUTION.pdf
TYPE OF SET VALVE
WAVEFORM ICW and CW
METHOD OF PRODUCING OSCILLATIONS SELF
WHERE USED/FITTED Type 51 HX is an H/F transmitter consisting of transmitter 5PX and Modulator 8PX, and aerial coil unit and a Receiver Type B11, the whole thing being rack mounted. It is a low power ICW/CW transmitter.  It can be fitted as a L/F or H/F transmitter complete.  In the former case, for use in Tugs and Trawlers it is known as a Type 51L, but when fitted in Destroyers, as Type 51H and will replace transmitter Type 83. "D" Class Destroyers have been fitted with H/F transmitter 5PX and Modulator 8PX with a separate aerial unit. In this case the complete outfit is known as the Type 51HX [which is shown separately with its own port hole].  The modulator is fitted to produce an AF tone of 1400 c/s for keyed ICW. Approximate range in miles = 50.

Valves of the transmitter are mounted in "sorbo" to prevent damage to the valves due to shock.  Many of the Type 51's instruments are fully enclosed in an aluminium box. Click on this thumbnail to read an OED [Oxford English Dictionary] definition of "sorbo".

The Type 51 series was extensively fitted and the list of ships is much too long to state. The variants were many.  We have shown you the Type 51, mentioned the Type 51L above, and now tell you about the Type 51HX. Others were Types 51HV, 51FHV, 51HW, 51FHW [the Destroyer Series]: 51LV, 51LW [Cruisers fits]  but all were very similar to the basic Type 51.  

ASSOCIATED WAVEMETER G8
SMALL SCHEMATIC
PHOTOGRAPHS