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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#41
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Vaseline on coax connection?
Slop a lot of silicone bath tub seal goop all over it.
cuhulin |
#42
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Vaseline on coax connection?
mm wrote:
On Sun, 16 Mar 2008 09:18:54 -0700, (Dave Platt) wrote: I've seen and bought "self-amalgamating rubber tape" (same principle, maybe the same stuff) at my local Home Depot. I agree, it's very useful stuff. I forgot about Home Depot, but when I was looking for it, they had it mail order** but never in the stores. I'm pretty sure I picked this up off the shelf in Home Depot: Gardner Bender Silicone Fusion Tape HTP-1010 UPC 032076560102 Bubble pack, red over gray card -- Iran tells us what the mainstream media won't: "A new opinion poll suggests that over 54 percent of Americans do not trust mainstream media and consider news websites more reliable." http://www.presstv.ir/detail.aspx?id=46837§ionid=3510203 |
#43
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Vaseline on coax connection?
In message , Jeff Liebermann
writes On Sun, 16 Mar 2008 16:46:20 -0700 (PDT), lbbss wrote: I wanted to use Vaseline, not for water proofing, but for making sure I have a good connection. The *ONLY* reason you might consider greasing the connector is for waterproofing. You'll have a good connection with or without the lube. There's nothing better than metal to metal. However, if you're using dissimilar metals on the connector, you may have a problem that Vaseline isn't going to solve. I suggest you read some of the replies to your question. There's considerable good info and advice in there. Exactly so. Vaseline certainly isn't going to improve a connection. However, most connections involving coax and connectors DO involve some degree of dissimilar metals somewhere in the joint. There is always the possibility of corrosion, especially under damp conditions. A coating of something which keeps out the moisture WILL certainly delay this (hopefully indefinitely). Anything which does not contain or absorb water should work (so I wouldn't choose to use my wife's moisturising cream). Also, it should not wash off of evaporate completely. Vaseline, silicon grease and dozens of other things should be OK. However, WD40 has an advantage as it chases off moisture present when you are making the joint. That's why I spray the connectors and the made-off ends of the cable BEFORE I put the connectors on. As insurance, I then spray again AFTER I have made the joint. -- Ian |
#44
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Vaseline on coax connection?
"lbbss" wrote in message
... I wanted to use Vaseline, not for water proofing, but for making sure I have a good connection. I wouldn't touch that with a 3m pole... |
#45
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Vaseline on coax connection?
dIan Jackson wrote in
: WD40 has an advantage as it chases off moisture present when you are making the joint. That's why I spray the connectors and the made-off ends of the cable BEFORE I put the connectors on. As insurance, I then spray again AFTER I have made the joint. If evaporation, as the WD40 spray leaves the pressurized can, and as it sits on the connector, lowers the temperature below the dew-point, you could end up introducing moisture rather than driving it out. -- bz 73 de N5BZ k please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. remove ch100-5 to avoid spam trap |
#46
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Vaseline on coax connection?
On Mon, 17 Mar 2008 08:21:11 +0000, Ian Jackson
wrote: Anything which does not contain or absorb water should work (so I wouldn't choose to use my wife's moisturising cream). Moisturizing cream is another name for grease or oil. There's nothing in the cosmetic use of the stuff that either absorbs (hygroscopic) or displaces moisture. However, there is some water in the stuff. My favorite variation on this theme is in a restaurant, where you can ask for "dry" toast, which means without any butter or oil. Also, it should not wash off of evaporate completely. Vaseline, silicon grease and dozens of other things should be OK. However, WD40 has an advantage as it chases off moisture present when you are making the joint. That's why I spray the connectors and the made-off ends of the cable BEFORE I put the connectors on. As insurance, I then spray again AFTER I have made the joint. The "WD" in WD40 means "water displacement". It doesn't chemically do anything to the water. It just shoves it aside or pushes it into the connector. Try spraying or pouring some WD40 into a test tube full of colored water. No reaction. Note the ingredients. http://en.wikipedia.org/wiki/Wd40 http://en.wikipedia.org/wiki/Norm_Larsen WD-40 and other greases probably make sense in an outdoor, corrosive, and high humidity environments, but for every day use on commodity RF connectors, it's a waste of time. It may keep water out of a clean pair of connectors, but if used in a dirty environment (i.e. the back of my hi-fi) and reconnected, it's highly likely to shove the now greasy dirt into the connector. This is not my idea of an improvement. In a past life, during the 1960's, I was involved in building and maintaining a recording studio. The place was stuffed full of connectors of all types and denomination. Nobody ever even suggested that we smear them with grease to "improve" anything, despite constant efforts dealing with very low level noise sources. Dissimilar metals between connectors were a problem and generally avoided. Searching the official list of 2000+ uses for WD-40 at: http://www.wd40.com/pdfs/WD-40_2000+UsesList.pdf the closest approximation is: "Lubricates the threads of coax/antenna connectors on amateur radio antennas" So it is written... so it must be. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#47
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Vaseline on coax connection?
Slop a lot of silicone bath tub seal goop all over it.
cuhulin Might or might not be a good idea. Some silicone sealant (the cheaper stuff) contains acetic acid, and (naturally) smells like vinegar. Using this as a seal for coax connections is a very good recipe for corrosion, as some of the acid will diffuse into the connector's airspaces as the sealant cures. "Neutral cure" silicone sealants are a better bet. The best are specifically rated for electronics use (and cost quite a bit). Consumer-type sealants that are stated to be noncorrosive, or advertised for use on metal are probably safe for use on connectors. Using silicone sealant directly on the connectors pretty much guarantees a semi-permanent, almost-impossible-to-repair-or-change joint. It's a real bear to cut it open and pick all of the bits out of the threads. Overwrapping the joint with tape, first, and then gooping over the tape and out onto the coax itself should be just as secure, and far easier to re-open at a later time. Either self-amalgamating rubber tape, or plumber's Teflon thread-tape could be used. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#48
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Vaseline on coax connection?
I am the real cuhulin.And Michaell Terrell in central Florida, anywhere
in the World will never lay hands on any of my computeres.He/she'it called me a dumbass. cuhulin |
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