Antique radios, Old Time Radios
Catkin_prototype
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| Tube type: |
Transmitting Triode, air cooled |
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Ca. 1925 up to 1945 no serial production. For
instance only development samples. ***** |
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| Identical to |
Catkin_prototype
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Successor Tubes
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ACT6
NT39
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| Base |
Wires
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| Filament |
Direct |
| Description |
Since 1920s British GEC was a leading manufacturer of external anode transmitting tubes, the so called CAT (Cooled-Anode Triode) tubes. In the first half of thirties GEC launched a line of smaller external anode tubes, referred to as Catkin valves. The most powerful Catkin valve was the ACT6, followed by NT39.
Here is a still unbased experimental sample of an ACT6-like power triode. It was fitted with an aluminum finned radiator, very similar to those used many years later for transistor power amplifiers. Who knows that this prototype could not inspire some of the modern audio folks or audiofools.
The sample can be dated around 1935
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| Information source |
-- Collector info (Sammler)
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Collection of
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