Not much volume other than that I think it'sI would expect those voltages. The Classic Tone 40-18021 710V CT has a little higher voltages than the Classic Tone 40-18016 660V CT that I have used.
I would put a 12AY7 in V1. YMMV.
Assuming a 250R bias resistor the MPD is ~104% which is fine. How does it sound?
Whoa, I guess I have to go and study up on cathodynes. I thought the 1.5K bias resistor would put the grid a volt or two below the cathode. Am I missing something obvious?
This might 'splain it...I’ve been looking at stuff on cathodyne PI’s and that 17Vdc grid voltage depicted on that Weber layout still makes no sense to me. Could anyone explain it?
This might 'splain it...
The schematic shows 17.4VAC. That is if there is 100mVAC signal at the input. I am not so sure a DC reading on pin7 means anything worth noting. Of course maybe there is something to it if it is a symptom of the issue we are looking for.
I really don't know. Depending on which meter I use, I get weird wild readings when there is AC riding with DC. As D'tar mentioned that reading may be out of place. I would think there would be scratchy pots if there was that much DC there. ?????So I’m going to just say that if there is 17Vdc to chassis on P7, then something is wrong. It should be a volt or two less then P8. Would you agree?