STC CV2221 / V235A/1K Heil tube
The anode should be 20V positive to the resonator when low noise output is required. The screen voltage must not exceed the resonator voltage by more than 50V. A permanent magnet of 1000 oersteds is required to focus the beam - 'Jessop' type 9501 and 10512 is recommended.
The output probe can be seen here, encapsulated within the envelope.
This file was last modified
14:50:27, Tuesday September 02, 2014
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