Rca t-120

[DaveWM]

got it. At first the horz was way off, would lock on 3 images. It ended up just needing the horz transformer bottom slug needing to be adj A LOT which surprised me. I checked the sync sep pulse with a freq couner and it looked good (15750 or there abouts) but the drive signal to the HOT was 125750. I adj the bottom slug to note which direction would speed up the osc, several turns out did the trick so now it has a rock solid sync.

The voltage divider resistor then shorted out to the frame, I was able to stick a piece of cardboard in there to temp stop that, and the 850 section opened up as well (same section where the short was) so I will have to order up some power resistors to complete it. will need to figure out a neat method for insalling them, I like to keep all the parts in the same location (like stuffing can caps) but the power resistor will be a challenge.

[Kevin Kuehn]

Could you simply solder the new resistor across the old terminals? Maybe make sure the old stays open by cutting the element a little.

[DaveWM]

it seems to be shorting to the chassis, hard to tell. There were two unused points on a term strip nearby, I did the open section there the 215v to 135v 850ohm. I Made up a 850 from 4 5w sand resistors i had on hand. a 300+350+100+100 in series. I work out to about 3watts 3.5 watts 1 watt and 1 watt. No wonder that resistor is out back its nearly 9 watts total (and the spec says a 7 watt). There are still two more a 650 and 650 they seem ok for now but I will fix that next time I go to the surplus store. I pretty much used up my supply of sand resistors. I do like the 5 watt jobs in series, maybe a 300+350 for the 650's.

Its working great now, I have posted some pics over at ARF.