He previously said that with the doorknob removed there was no arcing within the 1X2 or glow. So, the doorknob could be breaking down internally causing the arcing within the 1X2.
The arcing from the filament loop is another issue.
John
Quote:
Originally Posted by old_coot88
This is with the doorknob removed, right? What's happening to R89, the 470K resistor? Is it getting hot, or remaining cold? If R89 remains cold, there may be a leakage path from the 1X2 socket itself to ground that's dragging down the HV. If R89 is getting hot, it may be that the 1X2 (in this case either one) is gassy and passing unrectified pulse that's hammering the resistor.
A new cap isn't going to help until you get the current problem sorted out. All this cap does is smooth the rectified pulse coming out of the 1X2.
One other thing- when you re-installed the flyback, where you soldered the filament loop back to the 1X2 socket, are there any whiskers or sharp points to the joints? In soldering any HV connections it's very important to build a nice 'ball' of solder on each joint to eliminate any points.
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