I've never tried Mundorf resistors. The only one's I've seen are the large 10 watt types.
On the grid carbon composite types are best because they help in suppressing parasitic oscillations. Even if the grid drifts a little over time it won't hurt anything. The value on the grid is not crucial.
Don't use them on cathode's or plates though. These will determine your tubes operating state. "bias"
On the grid carbon composite types are best because they help in suppressing parasitic oscillations. Even if the grid drifts a little over time it won't hurt anything. The value on the grid is not crucial.
Don't use them on cathode's or plates though. These will determine your tubes operating state. "bias"