Type 55 Detector Amplifier and Variants
Frequency range:  500 to 1200 metres
Filament battery: 6 volts
Plate voltage: From 60 volt battery
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Type 55 front view
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Type 55 rear view
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Type 55 schematic diagram. Download image to enlarge, 

 

Contribitors and Credits:

1)  Lewis Bodkin  <05bodkin555(at)gmail.com>
2) Handbook of Technical Instruction for Wireless Telegtaphists
 
 

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Feb 14/18