Post choke is better, but a high ratio like 1-M over 3.3-K , with a 1-uf filter can clean up most anything...lol.d95err wrote:The schematic posted at the top of the thread references the heaters using the first B+ node, directly after the rectifier. This is a very noisy voltage, so it seems that it would introduce a lot of 100Hz rectifier noise into the heaters.
It seems like a better idea to use the screen or splitter voltage as a reference as it is much better filtered.
Express heater elevation.
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