• Country
• Great Britain (UK)

• Manufacturer / Brand
• Racal Engineering / Instruments / Electronics Ltd., Bracknell

• Year
• 1965 ??

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 106385

• 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.

• Material
• Metal case

• from Radiomuseum.org
• Model: LF Converter RA-237 - Racal Engineering /

• 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

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

• Other Models

• Here you find 113 models, 62 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Racal Engineering / Instruments / Electronics Ltd., Bracknell