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Eimac tetrode verses pentode in triode conection.

Gday I am perusing Eimac data. I note apart from the 4e27 and 4e27a Eimac makes a 4-125a that has very similar specs. Has anyone tested and compared in triode the 4e27 and 4e27a pentodes which are half the price and even cheaper the 4-125a tetrode.

What are the differences between pentode and tetrode in triode operation.

Are Eimac any different to normal tubes. I have read somewhere that perhaps the tetrode screen is closer to the cathode then most tetrodes. Have I got that correct?

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Topic - Eimac tetrode verses pentode in triode conection. - amnesiac 23:08:30 04/09/14 (13)
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