[ARC Tech-109]

Had the 914's in there and the drop is too high for the magnavox circuit so I wired up a 6JU8 in their places and ran thru the entire IF and chroma alignment and everything came together. Yes we have success. A few loose ends to tie up, one seems to be an issue with horiz blanking that's causing the right side of the screen to essentially go into cutoff. Bias and guns are set correctly and the cutoff remains when I run the horiz gun adjustments. Other issue is a touchy AGC and this seems to be a bad AGC pot on the rear apron, have not put an analog meter and run the control thru its range as of this evening.

Ended up replacing all of the tubes on the IF strip with new-old-stock. I sourced the tubes from AxMan Surplus in St. Paul MN which is this bazaar of electronics and other things that's been in business for almost 60 years and they have everything... and I mean everything including thousands of new-old-stock tubes in their original cartons so for $2.50/ea so I invested a good hour scanning thru them and got the everything I needed.

IF strip took a good three hours to get the response back into shape, I'm working with a Heathkit IG-57 sweep/marker generator that has seen better days. The IF sweep works correctly but for some reason the markers themselves are not so I had to basically eyeball the response curve and work from there, I used my Motorola R2670 service monitor to sweep the response of the chroma section as this has calibrated sweep/track and spectrum analyzer functions.

Once I clean things up a little I will snap a few realtime pics of the set in operation, source will be from a Sony VO-2860A editor and whatever tape I happen to grab.