Anyone know what the proper glitch resistor is for this unit? It's the desktop model. Glitch is blown, had bypass capacitor at Millen connector short. I think it's a 10ohm at 20w but not positive. Anyone know?
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Henry 3kD Premier ( 3cx1200D7 model)
- Thread starter Crusher
- Start date
Closest thing I see to a "glitch" resistor goes from Bee-Minus to the (+) side of the plate-current meter.
This would be R5. Says 25 ohm 25 Watt.
A short from the B+ to the chassis would put the surge current through the grid-meter shunt resistors R10 and R11. Hmm. Would go through the Plate-meter shunt resistors R12 and R13 as well.
The negative side of the HV doesn't normally go to ground, but to the tube's cathode through the relay. Since the grid is grounded, a short to ground goes through the grid-meter circuit.
Time for the calibrated eyeball. Find all the roached parts. May be more than one.
73
This would be R5. Says 25 ohm 25 Watt.
A short from the B+ to the chassis would put the surge current through the grid-meter shunt resistors R10 and R11. Hmm. Would go through the Plate-meter shunt resistors R12 and R13 as well.
The negative side of the HV doesn't normally go to ground, but to the tube's cathode through the relay. Since the grid is grounded, a short to ground goes through the grid-meter circuit.
Time for the calibrated eyeball. Find all the roached parts. May be more than one.
73
Oh I'm sure their is several issues. Will have to go thru it all. 25 ohm 25w sounds closer to what I was thinking. But I've only worked on one of these and guy lost manual. Also thinking of putting a glitch from Millen to plate choke somewhere. I hate all these little disc capacitors they used instead of real doorknobs for bypassing
Thank you nomadradio. Didn't realize the 8877 model nearly the same as 1200D7 model. The PDF helps.