RECEIVERS

CDY/CAR/B41

DATE OF DESIGN

FREQUENCY RANGE

14.7 kHz - 720 kHz

WHERE USED/FITTED

Receiver B40 is the main unit in Receiver Outfits CDY and CAR fitted in HM Ships and RN Shore Wireless Stations respectively. Four versions of the receiver are in service. The main LF/VLF receiver in the Fleet from late WW2 years right up to the introduction of the CJK receiver in the mid 1950's, and thereafter served with the Fleet to the end of our story [1980 and beyond] as a stop-gap to plug a break in reception. This was caused by the ICS [CJD and CJA] not having an overlap between the CJD's upper maximum frequency and the CJA's lowest useable frequency. The break in reception was between 525kHz and 2.01 MHz approximately. Between them, the B41 and its sister receiver, the B40 covered this gap. They were only supplanted when the FTA solved the problem of giving continuous coverage from VLF to HF. Fitted widely throughout the Fleet perhaps more than any other piece of kit !

IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.

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