Hi there,
I recently built a hybrid circlotron based on a schematic by "circlotron audio". It actually works, but I'm wondering whether the MOSFET bias will be long term stable given that it is set by the constant current sources for the tubes. I'm hoping that the current feedback to the tube cathodes might stabilize the arrangement, but I'd be grateful for any feedback here as I'm sure there are some hidden gotchas.
I recently built a hybrid circlotron based on a schematic by "circlotron audio". It actually works, but I'm wondering whether the MOSFET bias will be long term stable given that it is set by the constant current sources for the tubes. I'm hoping that the current feedback to the tube cathodes might stabilize the arrangement, but I'd be grateful for any feedback here as I'm sure there are some hidden gotchas.