[TenTec] Centurion amp turn on issues.

[john]

I've got a Centurion that has served me well for years but has recently 
started NOT starting, in that the filaments are turned on, but the step 
start that applies voltage to the primary of the HV (when in OPERATE 
mode) is not operating

I've re=seated the cable connections  to the interlock from the QSK 
board (which sources the 12V to the step start) to no effect.  The 
interlock switch itself In series with the 12 V) measures 70 ohms which 
is not going to help.

This problem started with turnon being  intermittent after 6 mos of non 
use. Now it won't start

  Is there any way to clean these little microswitch contacts ?

John

K5MO