Quote:
Originally Posted by old_coot88
Onward! Hey.   Give a holler when you've got the 'real' test gear in hand. I was gonna suggest the 'quick & dirty' method of signal injection using the 6V heater supply like you did earlier for the vertical. But with a proper signal genny you can attenuate the level as you work back stage by stage.
Since you've verified the plate voltages on the 12AU7, have you checked the three peaking coils (L10, L11, L12) for continuity? And how about the detector diode? What's its forward/reverse readings on the ohmeter? Not shorted is it?
oc |
The heavy hitter test gear will take a few days. I have to order a probe for the scope.
The peaking coils L10-13 all read at or close to spec. The diode reads .3v drop across it.
One thing I did notice after reading all of the voltages on the video stage tubes again. Pin 7 on the 12AU7 was the only voltage that was a good bit off of spec. It is supposed to read -.2vdc, it actually reads -.57.