Antique radios, Old Time Radios
RT656
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Country:
France
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| Identical to |
RT656
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| Similar
Tubes |
Normally replaceable-slightly different:
R656
Other base:
RT656_6pin
Other base and other heater:
RT56
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| First year |
1927
Saga of the Vacuum Tube, Tyne pp 404-406
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