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#16
08-07-2014, 02:01 PM
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This one is just a metal clip on the end of the wire. I went home over lunch and checked the voltage and it is still just under 15k. The arcing looks like it is comes from the hole the clip snaps into and they run out in random directions like I said about 1/2".
Gregb Last edited by Gregb; 08-07-2014 at 02:07 PM. 
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#17
08-07-2014, 02:26 PM
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very strange indeed. Correct no cup used on predictas, just the clip. should be fully seated inside the hole of the anode.
the dag should be grounded, try reading the dag to the ground (just touch one lead to the grey dag and one to chassis ground), it will prob be several hundred ohms since its (dag) not a perfect conductor. Wiping off can be problematic, I have seen dag wiped right of, sometimes its dust but you should still see a grey/back coating clearly on the back of the CRT (except around the anode). I generally don't overly clean things EXCEPT around the anode and around the HV cage.
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#18
08-07-2014, 11:08 PM
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Got the arcing problem solved, pulled it all apart again tonight and had a good close look with a nice bright light. There was a layer of scum on the tube around the connection point that the Windex wouldn't even touch, used some alcohol and a scotch brite pad and it cleaned up nice and it works great now with no arcing at all. The picture is really nice and the horizontal seems much better as well. Other than some adjustments I think its good to go.
Gregb
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#19
08-08-2014, 07:07 AM
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Hi GregB .
i was suspecting the cleaner you used left a residue. i see you found the issue. i thought i should mention for the benefit of other vidkarma memebers that- from what i have seen over the years, best way to clean high voltage areas is with alcohol. i always checked that the alcohol i used left no residue by applying it to my finger and checking for any "oily" substance that was left after it evaporated. methyl hydrate always worked good for me. common rubbing alcohol left oil.sometimes there is water in methyl hydrate so i always gave it 1/2 hour drying time before i fired up the high voltage,the high volage area has to be very clean! cheers, RonL
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#20
08-08-2014, 09:47 PM
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It wasn't a residue left from the Windex, not sure what it was as I could scratch it with a finger nail. I have found that regular drug store rubbing alcohol is not pure alcohol and maybe has an oil in it. You have to look for the 99% alcohol and it will leave no residue and evaporates within almost seconds.
Thanks for everyones suggestions. Gregb
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