[morzh]

Alan

Keep in mind, the resistors in tube schematics most often than not could be checked in-circuit (with the power down, obviously) before you de-solder them. It is due to the fact that the cold tube is essentially a bunch of open contacts with no conductivity whatsoever in between them, and so most resistors that in one way or another end up on some tube electrode with one of their pins are, in fact, have that pin hanging unconnected for the measurement purposes, and so can be measured in citu. This way you do not have to do any unnecessary soldering should you decide to leave a resistor in after it having been checked, plus the very act of the heating might introduce some damage to a resistor that otherwise might've been a perfectly good one.