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Old 12-20-2015, 11:20 AM
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Question Ghost Issue

My '59 RCA ctc-9 has a ghost image that I can't seem to get rid of. Any input would be appreciated. I use the same dvd player and rf converter with my other tvs so I have ruled that out. The fine tuning adjustment does nothing to get rid of it. Don't know what else to try. the ghost image is only on the right side of the picture.
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  #2  
Old 12-20-2015, 11:35 AM
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Caps?

How long have you had the set and did you recap the power supply? I have seen weird things due to power supply caps.
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Old 12-20-2015, 11:57 AM
old_coot88 old_coot88 is offline
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Try subbing the last IF tube.
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Old 12-20-2015, 12:28 PM
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I have had the set about a month. Previous owner recapped the set. I replaced one of the tuner tubes, the 6EA8 because the picture was "grainy". The tube was bad (shorted),that took care of that problem. The 6BC8 was "gassy" but seemed to be ok otherwise. I think I will scrounge up another one of those to see if that helps to get rid of the ghost.

Last edited by VA561; 12-20-2015 at 05:10 PM. Reason: correction
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Old 12-20-2015, 01:25 PM
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99% of the time it's either a wore our detector crystal or the IF alignment is funky. I can bring my jig over, but it's a pretty involved process.
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Old 12-20-2015, 03:04 PM
kf4rca kf4rca is offline
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Does the ghost move sideways as you adjust the fine tuning?
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Old 12-20-2015, 03:20 PM
walterbeers walterbeers is offline
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I had the exact same problem with a CTC 9 many years ago. Ghost is to the right of images and does no go away with anything. I did find the problem though. One that most techs never think of. It's caused by a bad delay line. Short across the input and output of the delay line and I bet it disappears although the color will be offset. I can almost bet the ghosting will be gone. Just find another delay line from another old retro RCA. Replace it and you will have a nice ghost free picture.
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Old 12-20-2015, 03:56 PM
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I 2nd the delay line. Had a few on 60's sets IIRC RCA's.
Also is the 6EA8 in the IF ?. Usually its mixer / osc in
the tuner.
After the delay line do the IF tubes & sub the tuner to be sure.
Alignment a LAST resort & I wouldnt do it without 3 NOS
exact number IF tubes........

73 Zeno
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Old 12-20-2015, 04:42 PM
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"Does the ghost move sideways as you adjust the fine tuning"?

No, the ghost pretty much stays where it is throughout the tuning adjustment.

"Also is the 6EA8 in the IF ?. Usually its mixer / osc in
the tuner."

Yes the 6EA8 is in the I/F. It is the mixer osc.
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Old 12-20-2015, 04:57 PM
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Quote:
Originally Posted by VA561 View Post
Yes the 6EA8 is in the I/F. It is the mixer osc.
The mixer osc. is NOT part of the IF, but rather the tuner stage which feeds the IF.
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Old 12-20-2015, 05:08 PM
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Sorry about that. It is in the tuner stage.
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Old 12-20-2015, 06:06 PM
old_coot88 old_coot88 is offline
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Quote:
Originally Posted by zeno View Post
Alignment a LAST resort & I wouldnt do it without 3 NOS
exact number IF tubes........
73 Zeno
Ditto that, bro. I've had the last IF tube cause ringing more times than I can count. It was always the last IF.
But it sure can't hurt to sub 'em all before even considering alignment.
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Old 12-20-2015, 07:18 PM
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I'll test the three I/F tubes tomorrow. It's easy enough to check those first.
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Old 12-20-2015, 09:13 PM
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Quote:
Originally Posted by zeno View Post
I 2nd the delay line.
3rd in the delay line, but maybe a terminating resistor has changed value? If that happens, some of the signal will bounce back to the delay line input, and back again.
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Old 12-20-2015, 09:32 PM
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It's ringing somewhere, detector, or filter circuit after it....

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