05-04-2013, 07:41 PM
Before buying a bunch of tubes, check to make sure you have filament voltages at each of the sockets (pins 1 & 8, IIRC) where the tubes are not lit. It may just be a problem with a filament line that has opened up.
You won't get much without the rest of those tubes in circuit. The most troubleshooting you would be able to do is to introduce a signal (touch with a screwdriver) the input grids of the 41's and listen for hum. It won't be very loud.
You won't get much without the rest of those tubes in circuit. The most troubleshooting you would be able to do is to introduce a signal (touch with a screwdriver) the input grids of the 41's and listen for hum. It won't be very loud.
