Band 1 Channel 1 Rod Pentode modulator

[LENINGRAD T2]

Hi Trevor,
I have large quantities of miniature tubes for your experiments:
1ZH29B /> 50 /
6ZH45B /> 50 /
6ZH1B /> 50 /
6P30B /> 50 /
1ZH37B / 10 /
When will you patent your modulator?
Adam