30-07-2018, 11:21 PM
On a series heater circuit you can take the rectifier out and add a 1N4007 and a 100k 2W resistor in place of the rectifier.
Then just run through the entire set with a DVM.
The base of almost any duff valve can be made into a tool to do this.
The diode and resistor can be fed from an isolating transformer if it is an AC set. Without heaters even the valves can be left in place in both cases.
Then just run through the entire set with a DVM.
The base of almost any duff valve can be made into a tool to do this.
The diode and resistor can be fed from an isolating transformer if it is an AC set. Without heaters even the valves can be left in place in both cases.
