• Country
• Great Britain (UK)

• Manufacturer / Brand
• Salford Electrical Instruments Ltd; Salford

• Year
• 1944

• Category
• Military Equipment (not Re, Tr or RXT)

• Radiomuseum.org ID
• 303902

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 4

• Valves / Tubes
• VR135 VR91 VR91 VR91 VR91

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Batteries / addl. power jack / 6, 120 Volt

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: Wavemeter W1649 - Salford Electrical Instruments

• Notes

• The W1649 is a VHF heterodyne wavemeter that can also be used as a signal generator.

  The IF is 15 MHz, tunable -2 MHz to +3 MHz.
  Wavemeter range 155-255 MHz. Accuracy +-0.2 MHz.
  Signal Generator range 140-240 MHz. Accuracy +-0.5 MHz below 220 MHz.
  The harmonics of a 5 MHz +- 0.01% crystal oscillator provide check points throughout the range.

  The valve complement is:
  VR135 (selected) Main oscillator
  VR91 Mixer
  VR91 Crystal oscillator
  VR91 Detector
  VR91 Output

  The unit also contains one spare selected VR135

  Power supplies:
  LT 3x2v accumulators
  HT 120v
  A special Type 633 power supply unit that fits in the place of the HT battery allows the wavemeter to be operated from any of the following mains supplies:
  80v 400-2000 Hz
  110v 60 Hz
  115v 400-2000 Hz
  180v 500 Hz
  230v 50 or 400 Hz

• Mentioned in
• Manufacturer's documentation

• Author
• Model page created by Bruce Taylor. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 5 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Salford Electrical Instruments Ltd; Salford