I'm going to have to clarify what I said: I would not use the vinegar variety for caulking, ie in large quantities where there are electrical parts "in an enclosed space." I was talking about in free air. I have used Dow Corning 3140 for that.
Sorry for misleading anyone, but, as always, glad to raise the issue for others to learn from the group experience. David G3UNA > > From: "Don Brown" <[EMAIL PROTECTED]> > Date: 2006/10/18 Wed PM 04:00:46 BST > To: <[EMAIL PROTECTED]>, <[email protected]> > Subject: Re: Re: [Elecraft] New KPA100 Rev. > > Hi > > My company manufactures a small controller used on aerobic sewage treatment > plants. I have over 50,000 of them installed. One of the requirements is to > seal all of the electrical wiring where it enters the controller box using > silicone rubber. This is to keep chlorine, HS2 and water vapor out of the > box. We provide a 4 Oz tube of GE Silicone II so our installers will not use > the wrong type of silicone. The Silicone II is alcohol based rather than > Acetic acid based (vinegar). I have received several circuit boards returned > with green corrosion on the resistor leads and circuit traces due to the > wrong type of silicone used. We found this because the silicone we provide > is clear and the installer had used white bathroom calk bought at the local > hardware store. I guess he lost the tube we provided in the parts kit. > > I would not recommend any adhesive be used on any Elecraft kit just as it > states in the manual. The wire leads are strong enough to hold the toroids. > If you must use something I would suggest a small strip of double stick foam > tape. > > Don Brown > KD5NDB > > > ----- Original Message ----- > From: "Don Wilhelm" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, October 18, 2006 9:35 AM > Subject: RE: Re: [Elecraft] New KPA100 Rev. > > > > David, > > > > I beg to disagree, some time ago I used some of the 'vinegar' stuff on a > > splice with insulated copper wire (#14 THHN) - and I can say that the bad > > stuff keeps creeping for a long way. After a couple years, I had occasion > > to examine it and found the stuff had crept up under the insulation and > > caused corrosion as much as 6 inches from the point where it was applied - > > It did make a good weather seal, but at the cost of electrical properties > > loss. Fortunately, this was not in any critical application. > > > > No longer will I use commonly available RTV direcly in electronics > > applications - even the consumer grade 'non-corrosive' RTV commonly > > available that I bought recently had a vinegar smell to it. > > > > 73, > > Don W3FPR > > > > > > > -----Original Message----- > > > > > > I think too much is made of so-called corrosive RTV (it's the > > > vinegar). The level of corrosion to bare metal is very small > > > and in free air stops fairly quickly. For other components > > > bathroom sealant is perfectly adequate. Enamelled copper wire > > > and toroids should be immune anyway. > > > > > > David > > > G3UNA > > > > > > > > > > _______________________________________________ > > Elecraft mailing list > > Post to: [email protected] > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
