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623

623; Armstrong Wireless (ID = 1650142) Radio 623; Armstrong Wireless (ID = 1650143) Radio
623; Armstrong Wireless (ID = 1650144) Radio
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623; Armstrong Wireless (ID = 1650142) Radio
Armstrong Wireless: 623 [Radio] ID = 1650142 933x397
Select picture or schematic to display from thumbnails on the right and click for download.
For model 623, Armstrong Wireless and Television Ltd.; London
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Armstrong Wireless and Television Ltd.; London
Year: 1973 ? Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) Semiconductors present.
Main principle Superhet, double/triple conversion; ZF/IF 455/3000/10500 kHz
Wave bands Broadcast, Long Wave and FM or UHF.
Details Hi-Fi equipment
Power type and voltage Alternating Current supply (AC)
Loudspeaker - For headphones or amp.
Power out
from Radiomuseum.org Model: 623 - Armstrong Wireless and
Material Wooden case
Shape Tablemodel with Push Buttons.
Notes

Double Conversion on AM. The high (3MHz) 1st IF allows LW & MW on one band.

Varicap tuning. Unusually the upper mechanical meter is the varicap tuning voltage, not AGC or FM tuning AFC. The lower meter has a button to select signal level or AFC error (centre zero is perfect tuning).

Six preset stations (preset by small multiturn potentiometers), 3 for AM and 3 for FM.

Stereo Multiplex decoder for VHF-FM (87.5 .. 108 MHz)

The rear 5 pin DIN connector has a choice of two levels:

  1. Left hand channel output, high level
  2. Ground (earth) connection
  3. Left hand channel output, low level
  4. Right hand channel output, high level
  5. Right hand channel output, low level

(note 1 & 3 are outer pins and 2 is middle with 4 & 5 on either side)

Part of the "600" series:

  •     602 Loudspeaker
  •     621 Amplifier
  •     623 AM/FM Tuner
  •     624 FM Tuner
  •     625 FM Receiver
  •     626 AM/FM Receiver

Model page created by Oron Cherry. See "Data change" for further contributors.



All listed radios etc. from Armstrong Wireless and Television Ltd.; London
Here you find 19 models, 17 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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