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#1
09-09-2012, 12:20 AM
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the cap across the osc coil tested a bet leaky and weak, so I replace it as well a .0047 paper in ceramic tube cap. put it all back, arcing gone on variester, hmm no pic, very dark pic,AGC barely does anything, poor sync lock, WTF....
I looked around where I had just checked some resistors in the sync sep circuit where I had to take them out of circuit (PCB), careful looking shows very small solder bridge right around where I was working. Cleared that out but its getting late so I am just going to call it quits for tonight. I am starting to dislike this set 
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#2
09-09-2012, 12:34 PM
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well that was it, the solder bridge must have been fouling the AGC. the new cap seems to have made the horz osc a tiny bit better as far as the ability to hold lock with the horz control. Still seems to have that problem with hard vertical lines, so think I will try a couple more things tube wise, then the scope and if that does not do it I will just pack it up and forget it.
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#3
09-09-2012, 03:59 PM
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don't know what the deal was with the horz pulling, I put the DVD box on it rather than the OTA from a modulator and it seems fine now. the line pairing is settling down as well. I will get some pics soon now, just have to take a break, too hot out in the garage. I decided to leave the brightner off, it has a better pic with it but not too bad with out. Plus I could not for the life of me figure out a good place to put it. I tried zip tie under the CRT neck but then the bump out would not fit. There was just no good place for it.
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#4
09-09-2012, 06:15 PM
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Make sure your source INTO the Blonder Tongue (or whatever)...is getting a good connection with decent RCA cables. I sometimes have to pay attention that the inputs to my little transmitter are not picking up hum bars from all the other stupid stuff I have in the same cabinet. I used to get all worried I was having filter problems in one of the sets....only to find out I was having issues with the source material.
I know it seems a bit elementary....but I've overlooked this a couple times before and JUMPED to the "worst case" conclussion.
__________________
My current "holy grail" is trying to get enough parts together to get a Singer TV6U going. Been kicking my ass for nearly a year now :-P
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#6
09-10-2012, 02:50 PM
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Under the heading of not leaving well enough alone, I was thinking about the horz eff coil setting last nite. the fact that the dip took place with a large bit of the slug out of the coil (I did drive it down it never got better) I got to thinking maybe one of the 3 caps that connect across the coil may be bad. I checked the .0022 that connect directly across it on the board, but I never checked the two .068 that are connected below the chassis. So even though I have it all back together I think I must pull it out again and check those. I generally just clip on lead, test, and then use a pig tail to reconnect if ok.
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#7
09-14-2012, 03:54 PM
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I have a slight purity issue on the bottom, tends toward greenish, I think its the yoke as it droops quite a bit due to plastic fatigue. here is a better pic with flesh tones. I ended up going without the brightner.
Last edited by DaveWM; 09-14-2012 at 05:13 PM.
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#9
12-10-2012, 10:45 AM
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Quote:
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#10
02-15-2013, 11:29 PM
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Pretty nice!
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#12
02-18-2013, 10:16 AM
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I don't think GE's looked that good from the factory! I'm jealous!
Great job! Now I want to watch "War of the Worlds" on it. The Gene Barry version!
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#13
02-19-2013, 09:41 AM
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That picture had me thinking all night! What Vectorscope do you use?
I have an antique Lectrotech V-7. I even pulled a KE schematic out and remembered how much fun some GE's were to work on! Again, great job!
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#14
02-19-2013, 11:01 AM
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Heath kit. got it off ebay, just needed to reseat some of the IC's to get it working. There is a pretty simple setup per the GE service manual, just using the color bar gen and a VTVM. A single test point and tweak coils for max and min, but I did not do that, but rather just diddled the two coils to get the best image on the scope
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#15
02-19-2013, 09:44 PM
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I too got a Heathkit vectorscope from the auction site. It came with the manual and I have not used it yet. I got it for the minimum bid of something like $10.00 plus very little shipping. I could not pass up the item for that price even if it sits on the shelf. I would guarantee that it was almost never used (if ever used!).
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