Quote:
|
Now the VTVM (vacuum tube volt meter) versions obviously had to plug into the wall, but I really don't know what the difference is in what EMF is applied in a resistance test; probably not much. They only plug into a wall outlet to power the tubes.
|
The ohms range test voltage on VTVMs was typically provided by a 1.5V "D" cell battery, not derived from the line voltage.