Hi to all,
Hi Platux,
watched your video several times.
downloaded (heavy!) SM, 26Mb.
not a Sony Trinicon expert, but a few suggestions.
H/V sizes do not seem to vary.
When you say video level varies straight at the Trinicon pickup tube,
did you measure at the preamp output (schematic of preamp photo #2)
or directly at the Trinicon's Target electrodes? (photo #1)
Video level at the target is in hundreds of microvolt/millivolt range.
Any bad ground at the faceplate or noisy preamp (look at the FET amp) can induce signal fluctuations.
just suggestions until a Sony camera expert comes along....
You have a PAL camera, correct? could try asking on UK-VRR forum, lots of ex-Broadcast experts there.
Appropriate sub-forum (TV & video) :
https://www.vintage-radio.net/forum/...splay.php?f=37
Best Regards
jhalphen
Paris/France