A few comments.
1) the CRT tags look like Rauland ( EIA 1101 ) or Zenith ( EIA 343 )
Zenith owned Rauland. They bought them in the early 50's to assure good access to CRT's. Known to be very hi Q jugs.
2) blue screen w/retrace most likely blue G-2 is too high or one of the other blue gun voltages is way off. Turn blue G-2 down til the lines go away & see
if it gets better. Actual blanking problems are not common.
3) tuner / IF. Take signal off set. You should get very nice snow & a "waterfall" from the sound. If not we can dig in further.
good luck
Zeno
LFOD ! & that goes especially for the Ukraine !
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Quote:
Originally Posted by bhegges
After some further repairs I am questioning how well the RF/IF sections are working. My thought was to splice in composite signals to see what the set can look like.
I found a few posts with various ideas along with a few points of caution such as transformer isolation, inverted phase signal, and signal strength mismatch. It is not clear to me where I would splice in composite video. My first thought might be at the video detector diode cathode (X9). I am confused around if there is signal that is needed ahead of the pulse gate diode (X11) as this feeds the horizontal output tx and deflection circuit.
Next post has the relevant portion of the schematic.
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