• Country
• Great Britain (UK)

• Manufacturer / Brand
• BSR (Monarch); Great Britain

• Year
• 1933 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 202783

• • Brand: Birmingham Sound Reproducers

• Number of Tubes
• 4

• Valves / Tubes

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 100-250 Volt

• Loudspeaker
• - - No sound reproduction output.

• Power out
• 2 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Heterodyne Oscillator LO/250 - BSR Monarch; Great Britain

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Notes
• Two frequency ranges : 5 to 15 kHz and 5 to 450 Hz.
  Harmonic Content <2% at f>20 Hz.
  15, 300, 1000 and 5000 ohm outputs.

• Price in first year of sale
• 38.00 GBP

• Source of data
• Experimental Wireless & Wireless Engineer

• Author
• Model page created by Roy Johnson. See "Data change" for further contributors.

• Other Models

• Here you find 95 models, 86 with images and 19 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from BSR (Monarch); Great Britain