RE: Grid emission question

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In Reply to: Grid emission question posted by onemug on July 31, 2016 at 10:44:03:

Three possibilities, all giving the same symptoms:

1) Gas can result in current flow, upsetting grid bias
2) Conductive deposits inside (on the mica insulators mostly) or outside.
3) Actual grid emission - the grid is close to the cathode and gets heated - and some cathode material can get transferred onto it. If it emits electrons, it's going positive.

A tube tester can only measure the effect - can't tell you the cause. Some say "Grid Emission", some say "Gas", some just "leakage".

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Follow Ups Full Thread

Topic - Grid emission question - onemug 10:44:03 07/31/16 (3)

RE: Grid emission question - Tom Bavis 08/1/1612:29:08 08/1/16 (0)

RE: Grid emission question - Triode_Kingdom 11:32:35 07/31/16 (1)

Thanks. Great explanation. nt - onemug 20:33:21 07/31/16 (0)

Follow Ups

RE: Grid emission question - Tom Bavis 08/1/1612:29:08 08/1/16 (0)

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