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03-12-2019, 01:26 AM
Hi makinrose
We are assuming that with the reverb control at zero there is no howl? How about with the preamp volume down? Circuit-wise, this is like a DR reverb channel only, no normal channel. Hopefully each cathode has its own Rk and Ck as that is one step to true improvement of grounding.
It is nonintuitive, but you might try a rubber band on the recovery tube.Leave it in place until you resolve the problem.
You might also want to go backwards through your ground improvements to see if they really are.
We are assuming that with the reverb control at zero there is no howl? How about with the preamp volume down? Circuit-wise, this is like a DR reverb channel only, no normal channel. Hopefully each cathode has its own Rk and Ck as that is one step to true improvement of grounding.
It is nonintuitive, but you might try a rubber band on the recovery tube.Leave it in place until you resolve the problem.
You might also want to go backwards through your ground improvements to see if they really are.
