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#91
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Are you talking about this one?
It still looks like silver colored paper to me but... I think that is the HV filter cap, doubt it would affect the vertical. |
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#92
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ok.
its metal. definatly metal. Its probably good then. It works. couldnt one of those vertical .005 caps cause the circuit to produce a distorted waveform? Im not sure, but you never know. |
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#93
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oops. I did some math calculations. I think I know the problem.
You did say you sent those off right? ok. well. The NOS caps I have are 500mmf at 20kvdc. someone said that they would work in the .005 6000vdc circuits. I said ok. I got them. well, if im not mistaken .005 is 5,000pf or MMF right? well these are 500mmf. so its .0005uf hmmmmmmmmmmmm. that may be the problems. |
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#94
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That's the problem. That would explain the poor linearity.
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#95
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i will dig up some new ones i know will work.
i got a bunch off ebay and they work fine in all the electrostats i put em in.
__________________
i collect and restore vintage radio's,tv's,and ham gear. email for more info |
| Audiokarma |
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#96
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hey!! Eric, those caps came in the mail today.
Im giving you a BIG HUGE thank you! That was the problem. The set is now fixed to operational order, and I now can conclude this project as closed, and a complete success |
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#97
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Cool, glad I could help
Quote:
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#98
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YAY! Am glad you got it working....now how about a pic with it operating?
Anthony |
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#99
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I second that one. After all the head scratching and frustration you had with the Motorola...it would be cool to see the finished result of all your hard work.
-Tony |
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#100
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With as much as you have changed in that set, it oughta have a damn good picture! Lookin forward to seeing it!
__________________
Charlie Trahan He who dies with the most toys still dies. |
| Audiokarma |
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#101
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yea, it works, except for it has a black bar on the left side now. I dunno why, but overall, the picture works.
when I get new batterys for my digicam, ill take a picture. |
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#102
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well crap, Just when I thought it was fixed, it conked out again.
both 12sn7 tubes died out, and the 6sl7 got super super super bright. crap. I pulled one 12sn7. it didnt make a difference, altho it used to. So immidiatly, i thought of a short on the filiment strings. i put the 12sn7 back in, and pulled out the other 12sn7. The string finally went out. i switched the 2 12sn7s around. this time, the filiment string didnt light at all, until i stuck that one culprit tube in. the 6sl7 started to glow really fast again. i pulled it out, and just stuck the filiment windings in, and the entire string finally lit, and the hv and picture came back up, except there was no vertical. but as soon as i stuck the tube back in, all the way the string would start to glow on that one side super bright again. so, i have concluded that one of my 12sn7 tubes (the 1st clipper/vert osc) tubes have developed an h-k short. im assuming, one of the filiment windings opened up, and then shorted over to cathode. I put it in my tube tester, and it wouldnt light. the short bulb lit. so the tube is gone. I dont have another 12sn7 to stick in there and try, I only have 2 6sn7s. the question is, Why did this tube die like that? I have no idea. maybe it was age. I dunno. Ive never had it happen. I was watching it, then all of a sudden a bunch of lines and garbled sound with hum just wrecked into the TV, and then the horiz clapsed, and the vert collapsed. so I look back there, seen half the filiment strings gone, and the other tube super super bright. I killed the power then. |
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#103
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...
Last edited by andy; 12-07-2021 at 10:42 AM. |
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#104
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I had a NEW 35L6 audio out tube develop a short like that after only being in the radio for a week. Being that the heaters were in a string, they lit up like a 60 watt light bulb! The sound from the radio made me think it was about to explode!
I brought the tube back to the store and they gladly gave me a new one. Mike, I found a 12SN7 in the garage earlier... i'll send it to ya, but it won't go out till Monday.
__________________
Charlie Trahan He who dies with the most toys still dies. |
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#105
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ok. Thanks!
I wonder why it just all of a sudden did that. hmm. |
| Audiokarma |
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