Quote:
Originally Posted by robert1
there could also be the possibillity that where the wire enters the cage (without the tape wrap) that there may be a "capacitance" issue, where the wires insulation is acting like a dialectric, especially where the wire itself is touching the metel on the HV cage, hence, the reason for the tape wrap.
that added capacitance can throw the waveform off, causing the squeal.
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There's a large hole cut out of the metal cage where the wire enters and it's supported by a piece on phenolic insulator. The squealing seems to come and go depending on the angle and pressure of the wire inside the box. It will be clearer in the next video I post.
Quote:
Originally Posted by holmesuser01
Your CRT is aluminized? I don't think you should need an ion trap, then.
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Yes, it's an aluminized 17BP4B. The probably used a bent gun to avoid confusion because the 17BP4, 17BP4A and 17BP4C are not aluminized.
Quote:
Originally Posted by old_coot88
Re. the low brightness, have you tried tweaking the brightness range a bit? Ie., shifting resistance(s) a bit to nudge G1 slightly more positive relative to the cathode?
Hard to be more specific without seeing the schematic.
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No, I haven't messed with that. If I turn the brightness up all the way now, the picture will get washed out. Here it is in a brightly lit room. I guess it's not that bad after all.
