Predicta 17" HV question

[DaveWM]

did you replace the C16 from that last schematic?

[Phil Nelson]

Originally Posted by DaveWM

did you replace the C16 from that last schematic?

Yes, and on checking, I see that I installed a 683 (.068) instead of 682 (.0068).

Sigh. Nobody to blame but myself. I will try to find time to change it later today. I suspect this will cure the height problem.

Now I see the value of testing new components when they go in. I wouldn't expect a high failure rate, but it would help prevent errors like this.

Thanks,

Phil Nelson

[DaveWM]

yea I know, I sure I have said it before but for folks that may have missed, this is where the value of an old school cap tester really shows up, take out the old, test its value (the null may not fully open but generally show some action), leave the settings alone, get the replacement ready and test, the eye should open without changing the settings much. Even badly shorted caps will generally still null enough to check. I sure hope this is it for you, I know its been a PITA trying to chase it down. good luck

[Phil Nelson]

Bingo.



The height is actually a little excessive now -- that's as small as I can make it -- and the linearity's not great, but we're back in the running.

Thanks again for the patient advice. This was a long detour, but on the way I learned how to use my BK TV Analyst to substitute drive signals, a trick that may come in handy in future projects.

Phil Nelson

[DaveWM]

looking good!