New things I have tried.
For voltage and video I interference I replaced all 0.10uf disk capacitors for modern ceramic and that seems to have helped the video tho there is still some wiggling at the top in the posted video it seems to be a little better now.
Replacing these capacitors resulted in a positive outcome tho I still have power problems.
Power is being provided by a transformer obtained from eBay. 115/230 VAC primary 16 VCT 0.8 A secondary 50/60 Hz
The voltage regulator was also replaced with one sold as new purchased off eBay. LM309K STEEL National Semiconductor 5V 1A Positive Voltage Regulator IC TO-3. From. Reputable seller 99.9% rating.
Still only getting 3.5V.
Pulled LM309 checking voltage at Diodes. 7.5VAC on each leg of the 2 diodes. Diodes floating I get about 7VDC on each leg and when combined with 4ohm resistor in circuit but no LM309 I get about 8VDC. When I put the LM 309 in circuit I get 5.35VDC on the input of the LM309 and 3.5VDC on the output.
I am still obviously having some kind of intermittent problem with the cycle reseting on the bottom and the cycle is consistently below the bottom track except when it resets high like captured on the video. The reseting on bottom and riding low on the buss track happen enough to be annoying.
So looking for the game problems I put the comparator on pretty much every chip on the board, even the ones I do not think it works very reliably, if at all, on for testing. There were a couple that lights flashed so the chips came out and tested good. There were a couple E1 & E2 that lights flashed intermittently and when pulled tested bad n my old B&K IC tester so I replaced them. I looked at the signals on the outputs on new chips nd it all looked the same and comparator reacted same. Later I pulled a 7450 and B&K said not in library, that's when I remembered the ALL11 tests ICs as well as programing ROMS. So I pulled up the 7450 and it was in library and it checked out good. So I decided to test the other chips the 74194 from E1 & E2 and they test good n the ALL11.
Not sure what to think about the 194's or the 50's I do know I have chips test bad in B&K and when replaced the board works in past and some chips test Good in my little Chinese tester and are not any good. I usually count on the B&K, and this is the first time testing chips with ALL11 Programer. Anyhow I still have problems. Still have sound issues.
Sound problems. Tested and or replaced everything except Mica capacitors. Power supplied by 25vct transformer and voltages are what is expected. 18VDC, -5VDC. I am using an MPSA06 as suggested earlier and it is in circuit as the schematic dictates.