Thread: Mazda 30F27 RF tetrode for TV tuners.
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Old 21st Dec 2017, 2:06 am   #19
Synchrodyne
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Join Date: Jan 2009
Location: Papamoa Beach, Bay of Plenty, New Zealand
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Default Re: Mazda 30F27 RF tetrode for TV tuners.
Quite relevant I think. I'd say that the EF8 was an early version of the shadow-grid principle, which GE then dusted off and re-used in 1960.


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