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#1
04-24-2007, 05:46 AM
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Hallicrafter Horiz White Lines
I finally got my tuner back and have recapped most of it. I have a problem with some white lines on half the picture. Looks like it may be some type of horiz foldover or something like that. I'm sure you pros have run into this a few times. I have tried about everything i could think of on this. The horiz drive control does make them change somewhat. The hi volt cap has not been changed yet because i haven't been able to find one yet (500mmfd x20,000 volts). Appreciate any help on this i can get. I took a picture of it if i can get it to attach. Thanks. Don
Looks like it doesn't want to attach! Will be happy to email it to anyone that wants to take alook. 
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#2
04-24-2007, 01:05 PM
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http://cgi.ebay.com/ws/eBayISAPI.dll...m=250106227466
http://cgi.ebay.com/ws/eBayISAPI.dll...m=150115612686 Caps from china, but 100% feedback. Not promoting the other item, just showing it as an example. They're around, maybe even Radio Shack. White lines have been discussed a lot here -- you can probably keyword search for "stabilizer" or "Blanking" or maybe "Macrovision". The VBI that's broadcast today has a lot of junk in it (closed-captioning, for example) that our old TV's can't cope with. Start by filtering it out before troubleshooting the set. It might be working perfectly already.
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#3
04-24-2007, 01:13 PM
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#4
04-24-2007, 03:52 PM
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If you move this message to the "Early B&W and Projection TV" forum, you may get more useful advice.
This is the "swap" forum -- for selling or trading TVs. If you mention the model number of your TV, that would also help. Phil Nelson
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#5
04-24-2007, 09:43 PM
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I think this link will do for the picture. The lines are there with no signal applied to the set. There is a problem in the horiz or hi volt some where. Take alook at the picture and you will know what i'm trying to say. Sorry about posting in the wrong forum my bad. The model # for this Hallicrafter is 818. Thanks all. Don
http://tinypic.com/view.php?pic=2ughp94
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#6
04-24-2007, 11:54 PM
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I'm not familiar with this model. It looks like ringing to me. Does this set have electromagnetic or electrostatic deflection? If its got a deflection yoke then check the capacitors in and around the deflection yoke assembly for leakage or opens.
Can't be too much more help there unless the set was in front of me.
__________________
Jordan
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#7
04-25-2007, 03:29 AM
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Didn't see any TV's, but I found this...will hafta do for now...heeheehee...
 ...maybe the link is to another part of the site, I'll keep looking for the image you were trying to guide us to.
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#8
04-25-2007, 04:51 AM
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The link above works for me but who knows. See if this one gets you there.
Don Link: http://tinypic.com/2ughp94.jpg Yes the set has a yoke on it.
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#9
04-25-2007, 10:45 AM
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Pictures are important. When you said "white lines on half the picture" I imagined them being horizontal, on the top half of the picture, not vertical, on the left half. These lines are not VBI interference. They are horizontal drive lines.
http://www.audiokarma.org/forums/showthread.php?t=68042 They're not Barkhausen lines (so don't go down that path). Ringing in the horizontal oscillator. Most vintage TV repair books have a chapter on it. Yout HO tube might test good but still have a problem, try a swap. Of course, always suspect wax/paper caps in the area.
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