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#1
12-04-2019, 04:14 PM
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On the color issue: the chroma signal is getting to the CRT, evidenced by your being able to vary it up and down with the color control. But the 3.58 reference signal appears to be missing (per your vid in post# 82). So apparently GE's (in)famous 'ringing crystal' circuit is not ringing. This could be from loss of the burst signal, bad tube, or possibly a bad crystal.
PortaColor gurus can no doubt pursue the issue further. Maybe somebody could post a full schematic and tube layout diagram. 
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