Wireless Set (Canadian) WS-52

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General Description

The WS52 Duplex Receiver was designed in 1943 as a stand alone receiver to be used in conjunction with the WS52 Transmitter/Receiver equipment. The duplex receiver is identical to the main receiver and was used to monitor the WS52 transmitter operation or to guard another frequency. (The main unit could transmit/receive on different frequencies - it was not a transceiver as such.)

The overall equipment has been judged as perhaps the best of the medium power semi-portable installations placed in service during WWII for the British Army. The unit was designed as a general purpose Brigade/Division set for use as a vehicle or ground station.

Technical Data

The equipment covers the frequency range 1.75 - 16.0 MHz on both transmit and receive. Transmitter power is 75w T/T and MCW, 100w on CW. The 3 wavebands overlap ranges being: (Band1) 1.75 - 4.00 MHz, (Band 2) 3.5 - 8.00 MHz and (Band 3) 3.7 - 16.0 MHz.

The receiver features a crystal calibrator giving 1000/100/10 kHz outputs. The stages of the receiver are conventional with RF/Mixer/Osc/2xIF/BFO/2xAF using ARP3s, DET/ANL using 12Y4Gs. The 3 calibrator tubes are 12SC7s. The IF frequency is 420 kHz.

The power for the receiver is supplied by a 12v accumulator driving a vibrator supply to provide 145v HT. Typical current drawn by the reciver at 12v is 3.3a. The remote receiver is driven by a ZE-12 Supply Unit 3A, which is identical to the main receiver supply.

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© Ian O'Toole, 2009. Page created: 28/04/03 Last updated: 11/12/2009