all correct.. soldering directly to pins, diode from grid to cathode in cathode follower to protect the tube,maxkracht wrote: ↑Tue Jan 23, 2024 5:39 pm My wall voltage isn’t that stable today so forgive a bit of variation.
Cathode is normally at 185-190v ramps up to 230v briefly during power up before settling back down. Grid gets full 450-475v then down to 190 after everything is warm, unless you add a neon from grid to cathode, then it stays under 240v. Grid to cathode voltage surged to 475 until tubes heat up. With a neon, Grid to cathode was 75v until heat up.
Neon is a good idea, though I once noticed some weird distortion when using a smaller neon. Didn't have time to investigate that one instance, but I have stuck with larger versions since noticing that and haven't had issues.
not series diode+resistor like in book from blencowe, because that resistor is preventing diode to do desired protecting action.