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- - Emerson Model 698 Series B (http://www.videokarma.org/showthread.php?t=260690)

Quote:

Originally Posted by dieseljeep (Post 3094714)

I looks like there was real problems with horizontal sweep. A bit of hack work, at it's best. I did the nut trick, when the adjustment slot got damaged, by using the wrong tool.
I'm trying to remember if other Emerson models used the air-core Flyback.

This is my favorite hack repair so far - Looks like someone snapped off a section of a couplate to replace a 5000pf capacitor in the sync separator circuit. It has .003 penciled in the upper left hand corner. At least they put some corona dope on the edge for insulation. :scratch2:

https://c1.staticflickr.com/5/4514/3...950b5b48_b.jpg

Quote:

Originally Posted by Kevin Kuehn (Post 3094731)

The original owner of the set must've quit using the set, years ago. There's a lot of nasty capacitors that need replacing. It looks like a ratty junk was used for replacement parts, which you were referring to.
What EIA code is on the CRT? I don't think it's a RCA sourced tube.

EIA code 210, which I think is Hytron. The CRT tested very weak(like lower third of the bad scale), but I have a GE replacement here that should work fine.

I discovered last night that my flyback primary tap going to the HOT is open. I have a Thordarson Fly-2 ordered that supposedly subs. I also noticed that the vertical output primary resistance reads about double what's it's suppose too. Looks like this restoration should be a lot of fun before it's over. :)

While waiting on parts I decided to remove the CRT and do some basic above chassis clean up. Apparently this set was kept in a location that allowed condensation to form and drip off the CRT. It's the only place there is significant rust on the chassis.
https://c1.staticflickr.com/5/4457/3...4a44e68f_b.jpg

I also found the break in my flybacks high voltage winding. It was hiding under a piece of insulation tubing going between the windings and the coil tap terminal. Unfortunately I found it after I'd already unwound a couple dozen turns off the HV donut. :o I was able to re-flow the wax around the HV donut, and everything is ohming out reasonably close. Only time will tell if I messed up my HV by removing those windings. Not sure if I can get away with running the HV winding wire directly to the solder cup. I suppose it could arc to something and vaporize that tiny wire.:scratch2:
https://c1.staticflickr.com/5/4510/3...a7414691_b.jpg

https://c1.staticflickr.com/5/4495/3...059bd685_b.jpg