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Old 01-31-2015, 05:58 PM
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Zenith6S321 Zenith6S321 is offline
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Join Date: Aug 2010
Location: Charleston, West Virginia
Posts: 303
I powered the set up on the bench without the HO tube and got good supply voltages and some noisy TV audio. I added a jumper to make it easy to check the cathode current on the HO and VO tubes. When I put the chassis back in the cabinet the chassis control shafts did not line up. The chassis control shafts were testing on the opening in the cabinet front and made turning them tough. I enlarged some holes so I could tilt the controls up enough to line up right.

I put the chassis back in the cabinet, reconnected everything and powered it up. Here are some pictures.

Yes we have a raster . Good HV, good raster, good CRT, but I could not get much audio or video. Turning the fine tuning did very little. Seems like a tuner problem.

I unplugged the tuner output and drove the IF with the Sencore VA62 45.75 modulated video and tone. I performed the Sams setup procedure and found the HO cathode current was 210 mA. Sams shows the current should be 190 mA. The horizontal efficiency coil was already adjusted at the dip. I could reduce the current by increasing the HV adjust, but it was 28KV to get it under 200 mA. My line voltage was at 118V, but I have measured it at 125V in the past.
Attached Images
File Type: jpg First-light.jpg (121.0 KB, 34 views)
File Type: jpg ColorBars-thru-IF.jpg (119.9 KB, 54 views)
File Type: jpg HO-210mA-118V.jpg (111.8 KB, 28 views)
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