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In Reply to: how much resistance on grids stopper also importance posted by lovetube on May 11, 2016 at 18:34:20:
Yes, carbon composition is the "correct" construction for grid stoppers, as that type of resistive material is both non-metallic and non-inductive. Hold the amount of metal attached to the socket lug to a minimum. An antenna for parasitic oscillation is very bad here.
The value used for grid stoppers depends greatly on the gm of the type being employed. High gm types are much more vulnerable to parasitic oscillation. A 100 Ω part is fine for the 12AX7 triode. OTOH, a minimum of 10 KOhms should be used at each of the 4 grid connections of a 5842.
Eli D.
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Follow Ups
- RE: how much resistance on grids stopper also importance - Eli Duttman 19:19:32 05/11/16 (3)
- RE: how much resistance on grids stopper also importance - Palustris 09:24:51 05/12/16 (2)
- RE: how much resistance on grids stopper also importance - Eli Duttman 13:28:39 05/12/16 (1)
- RE: how much resistance on grids stopper also importance - Palustris 13:35:20 05/12/16 (0)
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