Quote:
Originally Posted by Josef
I'd reverse the vertical and horizontal deflection wires and see what happens. If the pattern is mirrowed the defect comes from the electronics, if it stays the same the optics are faulty  |
Josef's test shows that the defect is in the electronics.
I reversed only the horizontal wires (pins 5 and 7 in the previous schematic). That should answer the basic question. Here, they are connected normally:
Horizontal wires connected normally:
Horizontal wires reversed:
The distortion flips horizontally, so clearly the big defect lies in the electronics. Thanks for suggesting this simple test, Josef!
That's actually a relief. Although I don't have an immediate solution for the electronics, that sort of problem-solving should be easier than trying to fiddle optical parts inside the Protelgram "black box" without the factory jigs originally used to align them.
Now I will put the three chassis back onto the workbench and resume my homework (testing voltages, etc.).
Regards,
Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html