[JSMCMS]

Hello again,

I think I spoke too soon. I got so excited with a stable and clear picture that I didn't notice that the width was way too wide. I attempted to adjust it but then I noticed that the B+ voltage was higher than expected (330 vs 275V) which drove the picture tube horizontal voltage too high (550 vs 480V).

My line voltage is 124VAC. I know that is higher than the designers expected in 1958 (110-120 is spec). I also replaced the selenium rectifiers with silicon diodes which added to the increased output. There's not much I can do about those two things but I am considering adding a power resistor in series with the B+ output to lower the voltage. Is that a good idea?

I am assuming that lowering the B+ will work because when I use an autotransformer to lower line voltage, I can get B+ and picture tube drive into the normal range at 100-112 VAC. That seems a bit low for the parallel heater string so I was thinking I could add a series diode to the heater string which will lower that string voltage but I am uncertain about how to adjust the B+ voltage.

Once again I am asking you guys for your thoughts.

Thanks in advance, Scott