admiral 24c15 with 20b1 chassis attempt at restore

[bandersen]

Yes, focus coil and he has it adjusted to such an extreme it is causing distortion in the upper left. It sure looks to me like the image is compress a bit on the left side and stretched on the right. If that was corrected, it would shift the center to the right.

I'd prefer to watch an image that was a bit off center but not distorted like you have it here. The corners of your programming are going to be cropped off anyway.

I'd also try a different signal source if possible. I think you are using a Leader LCG-400? It is entirely possibly that circle is not perfectly centered in the test pattern.

[fumplet]

Originally Posted by old_coot88

How does regular programming look on it? That was the criterion for most any service shop back in the day. That slight bit of horz nonlinearity in your last screen shot would likely never be noticed.
The rule for ion trap adjustment is max brightness consistent with no neck shadow.

Im still learning how to even recognize what all the picture issues are. More experience I guess. Somebody on the forum points out something on my picture tube image and I hadnt even noticed it. After its pointed out I see it which is good thats why Im still hesitant to put it in the cabinet till all the major oddities are fixed. Leader lcg 400 on 2001 flat screen crt 20 inch tv
yes Im using the leader LCG 400.

[fumplet]

Changed out .22 capacitor for two paralleled .1 caps to make .2 for original value. This cap goes to the 6bg6 tube. I tried adding caps to the .035 cap which is on the left side of horizontal lin. coil. Made picture shrink horizontally. I didnt want that. So caps on both sides of horiz. lin. coil are .035 and .1 I might mess with the .1. Also there was a 100 ohm resistor that measured 228 ohms. picture is better but i need to tweak it more to the right the whole picture. Focus coil isnt cranked hard horizontally lookin like its all crooked now. I still have it cranked but not near as much.

[fumplet]

the picture still has flagging at the top if I use the front controls to center picture. Gotta be something else to tweak. unless that .1 needs checked/ adjusted value. The .035 seemed to shrink picture inwards both sides so maybe try smaller than .1 or slightly bigger we will see. it was fun zapping myself with the test wires of the .035 cap, I wonder how many volts that was. Actually it was the jumper cap I was using. Made daughter jump as she was sitting next to tv on couch playing cards when it made the zap sound.

[fumplet]

Also need to find a power cord for it as i do not have one. Searching for admiral tv power cord on evilbay didnt get much

[Electronic M]

These use generic interlock cords that all TVs used back then. I think this used the ears style cord, but it may have used the groove style....Both are very hard to find.

If you need a cord that will plug into the socket on the back and power it, but don't need the ears or slot to interface with the back go to ACE hardware and look at the mixer cords in the extension cord aisle. Mixers and vacuum cleaners used the same cord for decades and ACE still sells compatible cords for the socket.

[fumplet]

oh thats perfect although I dont remember seeing cords at ace but theres an ace 3 miles from me. Will go look. Plenty of time I have used a xbox cord that doesnt really fit and had been working on the set only to have it"fail" when all it was was the ill fitting cord losing connection. Talk about going bat guano crazy only to find the cord came off again!!

[fumplet]

Im assuming the back of these tvs had the paneling style back and if they did mines missing.
Ace only sells the polarized version and mine has two round same size terminals. I guess Evilbay time.

[bandersen]

Likely perforated metal like this, but might also have been Masonite.



Power cord looks like this when installed.

[Electronic M]

Originally Posted by fumplet

Im assuming the back of these tvs had the paneling style back and if they did mines missing.
Ace only sells the polarized version and mine has two round same size terminals. I guess Evilbay time.

Interesting. I've never seen one with the TV end polarized at ACE. Always the same size. Later 60s and 70s sets tended to be polarized so I'll have to see if my ace carries polarized now too.

[fumplet]

Unless the wife didnt see another cord option at ace maybe there is but the photo she sent me looked like large hole and smaller hole. As far as the back of the set my cord option is the slide off hv cage, somebody apparently drilled it out. Dunno why.
UPDATE:ace does have non polarized cords wife didnt look close enough. Cord fits pretty good too!

[ronl]

You can in a pinch,use a small jeweler slot screwdriver to " squish" down the larger hole of a polarised cord to a smaller diameter.I would force the small screwdriver outside the metal connector of the larger hole and twist/bend the screwdriver around the entire circumference to force the larger connecter in.that will make it smaller. I did this many times in the past..hope this helps. RonL

[fumplet]

I might try to mod a cord to fit.
Im now trying to remember how to display the test image on my d/a converter box with a usb. all my images are in jpg format. I dont remember why its not showing up on the converter box as a choice. Homeworx media sonic hw 150pvr. I have 6 test images on a thumb drive that I think might be all the same but they dont show up in the homeworx list when I choose photo. I also need to find more test images to download.
Update: heres the usb test picture.
I should take off the ion magnet and check to see if the focus coil is centered. I know its not perpendicular horizontally or vertically.

[fumplet]

fascinating the picture I just took and uploaded was different than it looks now. Turn on tv take picture upload picture. Uploaded picture is with no warm up time. Picture gets shrunk some as it warms up and might even be clearer after warm up. I have put focus coil as close to yoke as possable and square to the tube. Latest picture of trying to dial it in. Makes me wonder if focus coil needs to be closer to yoke. I dont know what made image clearer, straightening of the focus coil or make it closer to yoke. Now picture seems to be oblong on right side but if I measure top to bottom and left to right its 6.5 inches for circle. Also is more pickey for horizontal lock so somethings out of adjustment because if the cables loose and I bump it introducing static it wont lock back on and picture tears unless I readjust it so must make sense, looks wonky and doesnt horizontally lock good. Oh the joys of tweaking not knowing what your doing. I try to adjust it so everything looks good and I get this line so I back it off and my pictures messed up some way or another. No idea why this line appears then dissappears depending on what Im tweaking.

[fumplet]

messed with it even more. Its the drive control that makes these lines if I back it off from tight too much. Makes one line and if I back off more makes 2 lines. Is the picture double folding over telling me dont do that or is this not normal. Is this possably a vertical problem? Real wild guess is theres caps hiding that need replaced, or, the flyback isnt so flybacking.
I just tightened the horizontal drive adjustment. Its now at full stop tight. Not gorilla tight but vertical lines are even less now. Things to try are swap 6bg6 with original one and maybe see what other components can affect this creation of lines.