I'd imagine that it'll be all good, but it's always good to check things like this to be sure. With heater supply voltage a tolerance of +/-10% is ok, though text books say +/-5% is better for power tubes. CheersLook at you... your always thinking.... Glad you mentioned it, because I didn't even think about checking the heater voltages! But I will check tomorrow. Thanks...
Apparently the heater voltages are in spec. I didn't feel like removing the chassis's to connect the meter to measure the heater voltages. Instead, I pulled the V1 tube and checked the heater pins from the outside. It's not the proper way to do this, and I know the readings might be a tiny bit higher because there is one less tube drawing current from the PT, but it should be close enough. Anyways, with the thermistors in place, the Spiffy has 6.28VAC at the heaters, and the Chihuahua has 6.56VAC at the heaters!
