Hi Guys
Through reading this thread the m269b and the u67 thread I have managed to overcome all the issues with my m269c build up to this point, Installed a CV 468 tube and the capsule managed to get the Heater Voltage to the right area with a load, but the B+ voltage didnt change at all upon plugging in the mic
The mic powers up fine and I get 6.3 on H+ and 127.5v on B+
as opposed to around 20v H+ and 128v on B+ unloaded
I can measure around 30v on the front diapgram but I am guessing reading from here is pretty inaccurate due to the impeadance
The only noise coming out the mic is from the switches, But they arent popping, it seems like you can actually hear the switches being switched through the microphone but nothing else. Also get an occasional squealing that I am guessing is a bad tube
Could this all be from a bad tube?
I have triple checked all the transformer, PSU, XLR and Capsule connections and just cannot work out the problem
For reference the mic has a CV 468 Tube, Peluso KK67 capsule and Sowter 1304 transformer
Thanks!