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09-27-2021, 05:08 PM
Hi Guys
As in the preamp tube switching thread, look at the insulation ratings of the relay you wish to use and that will tell you if it is okay for selecting power tubes. Usual ratings are 1kVrms up to 2k5Vrm. Think of the maximum signal on a tube plate as being twice the B+.
You will be switching these things with the power off, so no worries about pops or thumps. Yes, the power must be off since you want to switch everything including heaters. Were you only switching the plate and screen then you could do so hot - even with signal present, which actually makes the switching quieter.
Have fun
As in the preamp tube switching thread, look at the insulation ratings of the relay you wish to use and that will tell you if it is okay for selecting power tubes. Usual ratings are 1kVrms up to 2k5Vrm. Think of the maximum signal on a tube plate as being twice the B+.
You will be switching these things with the power off, so no worries about pops or thumps. Yes, the power must be off since you want to switch everything including heaters. Were you only switching the plate and screen then you could do so hot - even with signal present, which actually makes the switching quieter.
Have fun
