Admiral Telebar help

[Kevin Kuehn]

More specifically which chassis number do you have? The Sams website lists two different folders for that model number and the Horz circuits are not the same.

[dieseljeep]

Originally Posted by Kevin Kuehn

More specifically which chassis number do you have? The Sams website lists two different folders for that model number and the Horz circuits are not the same.

Riders shows that model number to use a 21B1 or a 21L1 chassis.
The schematic shown is not the right one.
The OP should only use the chassis number. Model numbers mean very little.
Riders volume # 13, page 13-1. There was a multitude of changes made throughout the production run.

[Kevin Kuehn]

Originally Posted by dieseljeep

Riders shows that model number to use a 21B1 or a 21L1 chassis.
The schematic shown is not the right one.
The OP should only use the chassis number. Model numbers mean very little.
Riders volume # 13, page 13-1. There was a multitude of changes made throughout the production run.

I suppose the .0039 cap was the clue to reading between the lines, but then again one never knows for sure what changes have been made to the set before someone comes on here asking for help.

[Radiotronman]

I've checked every resistor and cap around the horizontal oscillator and horizontal output tubes. Any out of tolerance resistors were replaced. I also tested the flyback and it tested good on my tester. I still get no hv. These Admirals are usually easy to restore. What am I missing and what's going on here?

[EdKozk2]

Tom asked you to check the damper. You should be getting at least 250 vdc on pin 5 of the 6W4. Pin 3 of the 6W4 should be about 415 volts, this is your B+ boost voltage. Make sure there is continuity through all the terminals of your linearity coil. These voltages are the same as your boost voltage and they pass through pin 1 of the flyback to the plate of the 6BQ6.

[Radiotronman]

Ok, thanks. I will take those readings and report back tonight. I used my BK Analyst and injected horizontal drive voltage to the cap of the 6BQ6. I now get an arc off the cap of the hv rectifier, but no arc at the second anode button on the crt. I still don't get a raster, but can hear the hv running with the analyst for the first time. I also checked and replaced any out of tolerance resistors in the base of the hv rectifier while I was at it.