Canadian Marconi CSR-5A Communication Receiver
- This receiver was described by the Canadian Marconi Company as a high grade instrument especially designed to provide the maximum reliability for fixed and mobile station operation.It was designed to provide maximum sensitivity and stability under the most severe conditions of operation, such as vibration and high humidity.
The frequency ranges covered are in 2 groups - 79 to 518 kc and 1.5 - 30 mcs.
The ranges are covered in 6 colour coded bands, the dial assembly being reminiscent of the Marconi R1155 aircraft receiver.
- The receiver features 2 RF stages, a crystal filter, front panel provision for crystal controlling the receive frequency, temperature and voltage stabilization, RF and AF volume controls, panel mounted noise limiter, panoramic output and exceptionally low local oscillator radiation from the antenna for use in marine service in hazardous locations.A choice of 2 external power supplies were available, the VP3 for 12vdc/115/230vac operation or the WE-11 for 115/230vac.
The audio output impedance was 500 ohms for line applications, 10,000 ohms for loudspeaker output as well as hi/low resistance headphone outputs.
The receiver weighs 58lbs in the rack mounted model, 68lbs when cabinet mounted.
V1 6SK7 1st RF Amplifier V2 6SG7 2nd RF Amplifier V3 6K8 Mixer Xtal Oscillator V4 6SG7 1st IF Amp (IF is 575 khz) V5 6SK7 2nd IF Amp V6 6B8 Diode Detector/AF Amp V7 6H6 Noise Limiter/AVC Rect V8 9002 HF Oscillator V9 6SK7 BFO V10 V R150/30 Voltage Regulator V11 6F6 Audio Output
The antenna input impedances were between 50 and 500 ohms.