ok... when i wasn't getting 445v on pin 4 of my tube sockets i started checking some of the resistors... i check the big 470ohm/5watt resistors on the tubes and they all read fine, but where they all joined up to attatch to another 470ohm/5 watt resistor there was no reading on that resistor... i'm thinking that this resistor has blown but the question is why? should i replace that resistor or is there a lot more touble shooting to try and find out why it went out? what could make it blow? could it be a bad circuit that i plugged my amp into? my tubes themselves?
I recently repaired a tube amp that just had one of the power resistors go open.
Sometimes components just fail.
Power the circuit down, unsolder one side of the resistor, and measure its resistance.
yeah... i did that... i took it out of the circuit and got a big fat nothing on my dmm... i guess it's gone... could it have been some kindof power surge?
It happens sometimes. People just explode. Natural causes.
resistors are cheap.i would replace it and see what happens..