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#76
04-30-2020, 04:00 AM
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As Notimetolooz noted, it looks like the three strange resistors on the bottom are not resistors. They are either capacitors or inductors. If you still have the three parts you removed , you can check them with an ohm meter. If they were resistors as you thought, then you will get readings fairly close to the color codes. Where in the circuit did you remove them from ? Also make sure your Horizontal Drive Adjustment capacitor is not tightened all the way, it can cause the picture brightness to act up because your horizontal output will start to red plate as the set warms up. You can check for an arc at the base of your 1B3, the filament pins. See Post # 45's picture.
Ed Last edited by EdKozk2; 04-30-2020 at 04:04 AM. 
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#77
04-30-2020, 06:13 PM
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Hope everybody doesn't hate me, but today when I went to jump the 2.7 resistor,
I noticed I didn't put in a 2.7ohm, but a 2.7K ohm... My resistor drawer, marked 2.7ohm, had a few 2.7k's mixed in. I obviously didn't pay enough attention to the multiplier band, and was only focused on the red and violet. I must be getting old as I mentioned earlier. Sorry to waste everyone's time like that... I do appreciate the help. There is now a clear picture, and the CRT is nice and bright! Glad I rescued this from the dumpster. The only thing now is the audio dies down pretty quickly and there is an annoying buzzing sound in the speaker. Volume is maybe halfway clear. There's also some horizontal lines across the screen, I did try to carefully adjust a few horizontal pots in the back, but didn't do much... I was able to follow the schematics guide to adjust the horizontal Drive, which did get rid of the center vertical lines though.
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#78
04-30-2020, 06:56 PM
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Glad you found the problem. If those are retrace lines, there is a circuit modification you can make to suppress them.
The modification for this and many other Admiral models can be found in the Riders publication. http://oldtubes.net/library/free_man...ures_Vol_1.pdf Or they might be from copyright encoding. Also that the image is in 4:3 format and should not fill the whole screen vertically. Something more like this taken from my set with the same chassis. https://flic.kr/p/23iBMxx Last edited by bandersen; 04-30-2020 at 07:00 PM.
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#79
04-30-2020, 07:00 PM
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Looks good,
 . You could try setting the brightness lower to reduce the vertical retrace lines. There may also have been a revision for that chassis/ model to reduce retrace lines. Look through literature in the pdf file.
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#80
04-30-2020, 08:38 PM
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Quote:
I will take a look at that TV trouble cures book and see if I can't fine tune this now...
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#81
04-30-2020, 10:07 PM
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You can see where I added the retrace mod near the top of my restoration thread: http://www.videokarma.org/showthread...=269953&page=2
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Linear Mode
