• Country
• Great Britain (UK)

• Manufacturer / Brand
• Pye Ltd., Radio Works; Cambridge

• Year
• 1956 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 102371

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

• Number of Tubes
• 7

• Valves / Tubes
• DF91 DK92 DF91 DAF96 DM70 DL94 EZ41

• Main principle
• Superhet with RF-stage; ZF/IF 470 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• Line / Batteries (any type) / 90-150; 195-250 / 9 & 90 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: PE94MBQ/LW - Pye Ltd., Radio Works;

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 400 x 300 x 205 mm / 15.7 x 11.8 x 8.1 inch

• Notes

• Wavebands in Metres (approximately) are

  1. Long 2000 to 800
  2. Medium 550 to 180
  3. MSW 100 to 36
  4. SW 32 to 25
  5. SW 20 to 16

  The DM70 and DAF96 are in parallel at the chassis end of the 9V series filament LT chain.

  The PE94MBQ is similar but exchanges LW for an extra SW band as is common on "Export" models.

  Both models can use external aerial connection for all bands as well as Telescopic aerial for SW and Loop Frame aerial (Ferrite Rod later modes) for MW & LW (MW only on PE94MBQ but extra SW band replaces LW).

  Another feature unusual for UK battery Valve portables is the tuned RF preamp (DF91). Probably 50mA types are used rather than 25mA types as the DK96 is not suitable for reliable operation on 16m  & 19m bands. The DL94 in theory is nearly twice the audio power of DL96 or DL92, but this was unlikely the main consideration for the 50mA types. The DAF96 filament  is used in parallel with DM70 for the 50mA series chain.

  There may be no P94MBQ/LW as the "E" is sometimes omitted in service sheets.

  Battery is balanced 90V & 7.5/9V combo pack with type "W" connector. Equivalents to

  • Burgess F6A60
  • Ever Ready B135
  • RCA VS019
  • Pertrix 85
  • Eveready (National Carbon) 753
  • Rayovac AB994

  Battery adds about 1.5 kg to the 8 kg of the Radio alone, so original operational wieght between 9 kg and 10 kg.

  Telescopic aerial length extended is about 1.5m from tip to botton of tube inside the radio case.

• Net weight (2.2 lb = 1 kg)
• 8 kg / 17 lb 9.9 oz (17.621 lb)

• Circuit diagram reference
• Radio and TV Servicing books (R&TVS) book

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Peter Hoddow. See "Data change" for further contributors.

• Other Models

• Here you find 628 models, 484 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pye Ltd., Radio Works; Cambridge