Quote:
Originally Posted by Phil Nelson
Interesting. The unknown TV in my Scott 800B radio/TV/phono set recently developed exactly one horizontal fold similar to the ones you are seeing. My first thought (fear) was that something may be going wonky in its vertical output transformer.
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Phil, did you think "vertical" and write "horizontal"?
Bob's picture shows vertical folding.
Giulio's picture shows horizontal folding.
For a
single horizontal fold, check the horizontal drive or do a complete wave shaping in the horizontal circuit.
Quote:
Originally Posted by Bobby Dip
Problem found 
The picture tube anode cable was broken internally. A quick resistance check showed no continuity. I made up a new cable with some HT wire I had on hand and now the picture is fine. The old cable must have been arcing across the break inside the wire. |
Congratulations!
Just wondering, did fixing the HV lead cure the bad vertical linearity problem too?
Usually arcing across an open connection appears differently, plus seeing the vertical linearity issue is why I incorrectly suspected the vertical output stage.
James