• Country
• Great Britain (UK)

• Manufacturer / Brand
• Armstrong Audio / Wireless & Television / Manufacturing; London

• Year
• 1963 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 136260

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

• Number of Tubes
• 12

• Valves / Tubes
• ECC85 ECC85 ECH81 EF89 EB91 DM70 ECC85 ECL82 ECL82 ECL82 ECL82 EZ81

• Number of Transistors

• Semiconductors
• OA81 OA81

• Main principle
• Superheterodyne (common); ZF/IF 430/10700 kHz; 4 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)     8 FM circuit(s)

• Wave bands
• Broadcast, Long Wave and FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 200-250 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 16 W (unknown quality)

• from Radiomuseum.org
• Model: Stereo Twelve Mk II - Armstrong Audio / Wireless &

• Shape
• Chassis only or for «building in»

• Notes

• Radio tuner with stereo amplifier; external MPX decoder required for FM stereo.

• Source of data
• -- Original-techn. papers.

• Mentioned in
• Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) (1401)

• Literature/Schematics (1)
• Paul Stennings CD, vol 2.

• Author
• Model page created by Keith Staines. See "Data change" for further contributors.

• Other Models

• Here you find 24 models, 22 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Armstrong Audio / Wireless & Television / Manufacturing; London