The Proper Way To Ground The Grids In A Sb-220 Heathkit
Here I show grounding each 3-500Z grid in a Heathkit sb-220 Clarification ...Each tube has 3 connections in parallel with the grid . A 3-500z is a triode which has one grid, a tetrode has 2 grids if a parasitic oscillation were to occur, You would also destroy the parasitic suppressors between tube anodes and plate choke. Enjoy
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