09-13-2013, 07:41 PM
Marty,
Reflow all the solder in the pins of your 41. This can take some patience, as it is sometimes hard to get the old solder to flow. Once it's liquid, add a bit of new solder into the tip of the pin. I reiterate: this does not sound filament related. If it were, the radio sound would drop over a few seconds once the filament opened. This is going out all at once. Since it does not go out with the 42 tube in place, it speaks to the 41 tube. Given this, either the tube is defective internally, or there is a cold solder joint inside one of the pins, where the wires from the envelope connect to the base. If reflowing this solder doesn't help, just toss that 41 and get yourself another one.
Reflow all the solder in the pins of your 41. This can take some patience, as it is sometimes hard to get the old solder to flow. Once it's liquid, add a bit of new solder into the tip of the pin. I reiterate: this does not sound filament related. If it were, the radio sound would drop over a few seconds once the filament opened. This is going out all at once. Since it does not go out with the 42 tube in place, it speaks to the 41 tube. Given this, either the tube is defective internally, or there is a cold solder joint inside one of the pins, where the wires from the envelope connect to the base. If reflowing this solder doesn't help, just toss that 41 and get yourself another one.
