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  #16  
Old 04-10-2011, 12:37 AM
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Any silicone, "sensor safe" or not, should suffice. The glass sealer marty59 mentioned is much more liquid than RTV if that is a concern. The Permatex website could spell out the differences but any of the Ultra RTVs would do. The black does have the least odor and dries pliable, the blue is about the same, copper is a little softer and grey dries harder than the rest but is the strongest. The ultra rtvs' curing process can't induce corrosion, something that could happen with the regular formulas (hi-temp red, blue..)

Last edited by AUdubon5425; 04-10-2011 at 12:53 AM.
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  #17  
Old 04-10-2011, 12:37 AM
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I've had good luck with GE silicone II. It has no acetic acid smell, and seems to hold up well around high voltages. I suspect a large percentage of RCA flyback failures are caused by deterioration of the rubber coating. Once the resistance gets low enough, it arcs across the edge and burns up the flyback quickly.
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  #18  
Old 04-10-2011, 10:54 AM
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After reading the MSDS on the Permatex stuff, looks like I'll stick to RTV3145 in the future.

Cheers,
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  #19  
Old 04-10-2011, 12:59 PM
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Quote:
Originally Posted by Findm-Keepm View Post
After reading the MSDS on the Permatex stuff, looks like I'll stick to RTV3145 in the future.
What did you see in the Permatex RTVs that concerned you? (trying to learn something here)
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  #20  
Old 04-10-2011, 06:14 PM
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Here's a magazine ad from May 1966 with your TV in it...
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  #21  
Old 04-10-2011, 07:59 PM
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Last edited by andy; 11-18-2021 at 05:23 PM.
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  #22  
Old 04-10-2011, 08:56 PM
joemama99 joemama99 is offline
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The one on the top left is the ctc-20 that I own.Anyone know the name of that model?
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  #23  
Old 04-10-2011, 08:58 PM
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Quote:
Originally Posted by AUdubon5425 View Post
What did you see in the Permatex RTVs that concerned you? (trying to learn something here)
First, less than 40% of the product is rubber (siloxane). RTV3145 is > 60%.
Second, one of the chemical components (listed as 5-15%) is SYNTHETIC ISOPARAFFINIC HYDROCARBON (spelling corrected from "Hydrocaron"" - kerosene for short. Kerosene will dissolve paraffin, the very wax in the flyback, and this might create a problem.
Third, I've used RTV3145 (gray only) before on flybacks - countless TV flybacks and, while in the Navy, on high voltage transformers in several dozen in F/A-18 MPDs (multipurpose displays) without failure. In the MPD, corona would develop in high humidity (Indian Ocean ops), and we sealed the lead and connections with RTV. It kept the "Smoky odor in cockpit" gripes down.

My only drawback with RTV3145 is the damn cost - now about 26-30 bucks a tube. Andy's suggestion to use GE Silicone II looks more promising in the economic sense. 100% elastomeric rubber, and commercially available (our hardware store sells it in three tube sizes!)

Cheers,
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  #24  
Old 04-10-2011, 10:38 PM
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Quote:
Originally Posted by Findm-Keepm View Post
...high voltage transformers in several dozen in F/A-18 MPDs (multipurpose displays) without failure...


You mean MPCD, unless the Legacy stuff was only one color- Supers have a color center display.
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  #25  
Old 04-11-2011, 12:29 AM
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Hawkwind, thanks for posting that ad!
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  #26  
Old 04-14-2011, 07:52 PM
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Quote:
Originally Posted by marty59 View Post
Hawkwind, thanks for posting that ad!
Your welcome! It's from National Geographic magazine. I tried to zoom in, to get the model names but the print is just a little bit too small to read.

the best I can make out is:

A= Rupert
B= ?
C= Cabot
D= ?
E= Karistadt or Karlstadt

...
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  #27  
Old 04-14-2011, 08:22 PM
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A The 21" Rupert Contemporary consolette
B The Genoa 21" Moorish lowboy
C New 19" Color TV: the Cabot Colonial consolette with casters
D The Bremanger 19" Nordic concsolette with casters
E The 21" Karlstad with clean-lined Scandinavian styling
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