[ARC5] T-22 Capacitors

[J. Forster]

Has anyone really checked to see what the impact of a slightly leaky capacitor
is on the operation of a T-22 ?? There has been a lot of discussion about
replacing them, but WHAT DO THEY DO ??

Take a look at Figure 25 in AN 16-30ARC5-2. The capacitor in question appears to
be C58

C58A is a bypass, isolated by a 20 ohn resistor. Probably little consequences to
any leakage here, unless the cap overheats. This can be checked by powering the
TX up gradually, with the filaments off.

C58B is part of the resonance indicator, which you probably do not use. A leaky
resistor could upset the bias on this tube and might cause tube damage, but I
have not analysed the circuit.

C58C is bypassed with R74, a15K ohm +/- 10%,  in the PA bias circuit. Is the
leakage significant compared to this resistor?

IMO, unless the leakages are large, they are not really significant.

Flame shields up !!

-John