mica capacitors

[Electronic M]

A common problem on sets is infant mortality....Some parts test fine, but after a short time under rated load fail...Our sets usually have two periods of infant mortality, initial deployment when new, and during/soon after restoration. If you left carbon comp resistors in it, then one or more may have drifted or outright failed since you last ran it. Modern parts usually have a low enough infant mortality rate that you are unlikely to experience it. Another thing to be wary of in electrostatic sets is the tube sockets...They are often ran close to their insulation dielectric ratings in the HV and deflection stages, and thus internal arcing, carbonization (SP?), etc. can form and be hard to detect.

EDIT: Looks like Mr. Albrecht slipped a post in under me.