Quote:
Originally Posted by Rocket
Thats crazy huge!
Ah! that's awesome to know! I may have to check that out and see how that changes things. But yeah, there is a few spots on that very outer 1-2'' that is lousy. but you can't really tell when tuned into a broadcast and does look great from 10 feet back. its impressive the quality of the picture on these older sets!
Indeed you remember correctly, it does have a tube rectifier. And I am up for helping out that flyback. I did notice the ma's surge over 300 for a very brief moment when the tv is first turned on. How hard is that to do solid state conversion?
I am not sure what I am looking for on the arching/corona. Do I need to do that check when the tv is running? I did notice that there was a static build up on the lead coming from the top of the hv cage. I did attach a few pictures of the flyback as well. I have a hunch that I am going to doing that flyback surgery to remove the rubber and do a silicon coating.  |
Moving the yoke is for when things are badly out of range...Most procedures have you do the RG horiz and vert lines top and bottom first. I recently did a set where those would barely converge. The controls could barely achieve symmetrical mis-convergence (which consisted of bad mis-convergence over ~2/3 of the screen) moving the convergence yoke a bit got it to where I could converge it perfect to within 1" of the edge.
The SS upgrade consists of unplugging the tube, connecting a HV diode across the solder lugs on the underside of the socket banded end to cathode pin other end to plate pin...If you have a rect tube with an open heater you could put it in the socket for appearance. Putting two SS diodes in series for higher PIV tolerance may be advisable move...IIRC the upper focus voltage on some roundys is partway between 4 and 5KV so a single 5KV PIV rated diode may not have enough headroom. This probably will only knock less than 5mA off of H output cathode current.
In a dim or dark room with the HV cage open look for blue or purple glow inside the HV cage with the set running...The 16 and later RCAs did not make doing this easy with the way they mounted the rect into the lid.