Quote:
Originally Posted by Kevin Kuehn
I'm not sure what you find odd about that? At any rate you should not consider it a fault of your vintage TV. The fix is unplugging the offending modern noise sources.  |
I'm not trying to fault the vintage stuff per sey, just more sort of curious, is tube tech more susceptible to RFI? Or solid state less, or a combo of both?
I have only had the 2 recent tube tech ones to reference recently so I'm not sure.
And since my computers ( main systems & server & home ent system ) are part of what I use on a day to day basis, it's unlikely they will be shut off any time soon! :p
Not to mention the networking systems, both wired in wall and wi-fi, modem, router,hubs etc :0
Anyway, so far my FADA has been run now for about 16-18 hours w/o any problems, the last few with direct input.
Aside from perhaps making another stab at IF alignment someday, the only other thing I'd like to try again is vert blanking mod, after I was not happy with the first 2 tries.
Looking at the SAMS for the SC x21 the I will be getting, I thought perhaps I could use the circuit they have.
https://imgur.com/gVpu2B8
As this sort of worked, but had a black band at the top of the screen.
===
1. Place a 47k resistor between pin 11(cathode) of the CRT and ground.
2. Connect a .05uf, 630v cap from pin 3 and 4(plate) of the 6K6 vertical output
to pin 11(cathode) of the CRT.
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the RCA manual shows it to be 700v there on the plate of the vertical output, ( a bit high I would think to use here ) and 60v in the yolk.
If I were to try to use the input signal to the yolk as source, do I still use 47k to gnd on the cathode?
or perhaps a 100k pot, and adjust for best results?
and the cap, use one? and just try diff values to see what works?
or more like above in the x21, 2 in series with a pulldown midway.
So many choices
