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Valve Gallery -
Frequency Converters (1) Valves:
41-MPG, FC4, TX21, MX40.
 
| Shown above is a Cossor 41-MPG frequency
converter. Utilising a B7 base this is a heptode with 4v heater
approx 140mm height |
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Shown above is a Mullard FC4 frequency
converter. This is an octode utilising a B7 base and 4v heater
approx 146mm height |
 
| Shown above is a Tungsram TX21 frequency
converter. Utilising a B7 base this is a triode/hexode with 21v
heater approx 152mm height |
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Shown above is a Marconi MX40 frequency
converter. Less commonly utilising an unmetallised glass envelope of
150mm height. Again using a B7 base and is an heptode |
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Frequency Converter gallery page
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