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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Feb 05, 2008 9:03 am Post subject: What a light show |
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I have an SD146A Tube that was hissing. The hissing would stop if I disconnected the HT lead so I changed the lead thinking it may be faulty. The set was switched on in a darkened room and there it was, high tension arcing down the side of the tube. It appeared to originate at the base of the tube bell where the face of the tube is attached.
Has anyone seen this before and does it mean the tube is toast. The face of the tube shows no wear.
KM
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CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
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| Posted: Tue Feb 05, 2008 4:45 pm Post subject: Re: What a light show |
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| km987654 wrote: | I have an SD146A Tube that was hissing. The hissing would stop if I disconnected the HT lead so I changed the lead thinking it may be faulty. The set was switched on in a darkened room and there it was, high tension arcing down the side of the tube. It appeared to originate at the base of the tube bell where the face of the tube is attached.
Has anyone seen this before and does it mean the tube is toast. The face of the tube shows no wear.
KM |
It's possible that the HV boot that connects the HV lead to the tube could be faulty, allowing the HV to "leak" out and arc along the side of the tube. Here's a writeup about how to remove the boot and replace it (note that if the boot itself is faulty, you'll need a new HV lead/boot):
http://www.curtpalme.com/HV_Lead_Removal.shtm
DON'T run the set with that arcing going on though - it can damage things very quickly! If it's not the boot, then sorry to say, the tube is probably cracked somewhere.
Good luck!
Ben
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deronmoped
Joined: 03 Nov 2006
Posts: 1154
Location: San Diego
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| Posted: Wed Feb 06, 2008 6:41 am Post subject: |
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What PJ is this tube in? Barco 1100's are famous for eating these tubes up.
Deron.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Wed Feb 06, 2008 8:19 am Post subject: |
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Its a Barco 1100.
After closer inspection its clear that the arking was coming from the side of the tube where the bell meets the lens or face of the tube. I have applied silicon to this area in an attempt to insulate it. My silcon skills are really improving a few more tubes and I will be ready to perform breast implants.
KM
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Thu Feb 07, 2008 12:06 am Post subject: |
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| km987654 wrote: | Its a Barco 1100.
My silcon skills are really improving a few more tubes and I will be ready to perform breast implants.
KM |
I can be your 'quality tester' post op. 
_________________
Sorting the fly sh*t from the pepper
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