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  #76  
Old 08-05-2011, 07:13 PM
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old_tv_nut old_tv_nut is offline
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Sorry the resistor didn't cure the ghost.

Dimming and vertical shaking -- could it be AGC instead of HV?
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  #77  
Old 08-05-2011, 07:25 PM
DaveWM DaveWM is offline
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no this is somethingn very odd going on, I just timed it, every 20 seconds I get a vert shake that last about 3 seconds, its like clockwork.

I have had odd bends (hulas I call them) that seem to be a beat freq of the vert rate vs the line rate, slow moving weaves.

argh...

when I had the hula it was a bad ground on the defection board of a mid 60's B&W maggie.

yep still doing it, every 20 seconds it gets the shakes for about 3 seconds.
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  #78  
Old 08-05-2011, 07:34 PM
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Yes, this sounds like 60 cycle hum getting in somewhere and rolling through due to the 59.94 Hz vertical of NTSC. Need to check grounds, but also power supply hum.
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  #79  
Old 08-05-2011, 09:21 PM
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this is getting strange, I scope the 405v B+ get the normal amount of ripple then bang 3 seconds of wild fluctions. take out the 3rd IF (no sync) same deal. then I scope the power line (thru an isolation transformer), sure enough garbage on the line now time to go try another set in another room, yep, same deal (this is another CTC-16) ok looks like something somewhere is messing with my power line. I am near a few real hogs (universal studios).

I think I will stop now and try again tomorrow.
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  #80  
Old 08-05-2011, 09:31 PM
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I plugged in my line meter, yup, like clock work, I even notice my shop light dimming. I checked to see if there was a piece of equipment (pool pump, AC compressor) that maybe was thermal cycling, but all seems ok. going to try a few differnt outlets. not seeing anything on the modern sets, but I would assume they have better power regulation.
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  #81  
Old 08-05-2011, 09:58 PM
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hmm had a lighting storm around the time this started, could the power compay be having a issue? maybe something cycling do to a lighning strike?
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  #82  
Old 08-05-2011, 10:08 PM
ctc17 ctc17 is offline
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I wonder if this is the line frequency change thing that was going to screw the clocks up. Very doubtful, just a thought.
Scope the line and see whats going on there.
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  #83  
Old 08-05-2011, 10:54 PM
DaveWM DaveWM is offline
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Wow how wierd is this, freaky computer printer. unplugged it an all is good.

it was on the same circuit as the tv. so now I am back to the ghost again.

funny thing, while looking for a source of AC hum, I did a check of all the tubes for HK shorts, one of the 3 6GH8's (big suprise there) and a 6UA6 (sound board) had shorts. Did not seem to matter. Of course maybe the short just as not that bad.
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  #84  
Old 08-05-2011, 11:02 PM
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Quote:
Originally Posted by DaveWM View Post
Wow how wierd is this, freaky computer printer. unplugged it an all is good.
I have seen laser printers pull down the line when printing, enough to make fluorescent lights flicker, but I assume you weren't printing anything at the time.
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  #85  
Old 08-05-2011, 11:09 PM
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correct not printing but it has been acting up somewhat, and my UPS recently died (it was not that old less than a year). perhaps the printer had been stressing it out. I just recently unplugged it from the UPS after it died and plugged directly into the same power strip that the TV was on. Lesson learned, big time.
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  #86  
Old 08-05-2011, 11:22 PM
DaveWM DaveWM is offline
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it was not just pulling it down either, I mean it was trashing the B+, worse that when the AC comes on,which just drops the vert size a tad but this was really disturbing the heck out of the set, more like something was arcing. Flickering sound about right. oh well, like I said its just one more thing to file into what can go wrong.
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  #87  
Old 08-05-2011, 11:54 PM
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Do you have one of those new power meters that they can read through the power line? They cause all kinds of strange anomalies. My electric panel sometimes makes a loud 60 cycle hum for no reason. Nothing but a few lights on and the AC not running. My friend 30 miles away said ever since they installed the new meter, his plasma TV acts up on a very timely cycle. Acts like the power supply is going but it's not. The meters are read quite often automatically.
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  #88  
Old 08-06-2011, 12:10 AM
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more hi tech garbage, bet its made in china...
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