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LF Converter RA-237

Country:  Great Britain (UK)
Manufacturer / Brand:  Racal Engineering (Racal Instruments) Ltd., Bracknell
Year: 1965 ?? Category: Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter
Main principle RF Converter/Adapter (not voltage converter); ZF/IF 2500 kHz
Wave bands Broadcast and LongWave in ONE range.
Power type and voltage Alternating Current supply (AC) / 100-125; 200-250 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: LF Converter RA-237 - Racal Engineering Racal
Material Metal case
Shape Rack
Dimensions (WHD) 483 x 88 x 330 mm / 19 x 3.5 x 13 inch
Notes Longwave Converter matching RA-117 receiver.
The converter mixes the incoming signals from 12,5 to 980 kHz to an IF of 2980 to 2012,5 kHz, the frequency can be read from the red coloured dial of the RA-17.
Internal preselector with a logging dial switchable for 10-20 kHz, 20-40 kHz, 40-90 kHz, 90-210 kHz, 210-500 kHz and 500-980 kHz segments.
As the RA-117 does not provide a tuneable 2 - 3 MHz filter, the RA-237 provides an extra input filter to prevent interference from 2 MHz signal.
Net weight (2.2 lb = 1 kg) 6 kg / 13 lb 3.5 oz (13.216 lb)
Mentioned in Racal Handbook, Rinus Jansen

Model page created by Martin Bösch. See "Data change" for further contributors.

All listed radios etc. from Racal Engineering (Racal Instruments) Ltd., Bracknell
Here you find 105 models, 50 with images and 11 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.