Radials are a lot of work to put in, and the expense of wire is significant. I can't see any justification for not joining them the best way available. IMHO, silver brazing.
I use and recommend Sta-Silv 15 (15% Ag, 80%Cu, 5% P brazing stick) and a simple MAPP gas torch. Propane is not quite hot enough to work well. Liquidus is 1475F. Flux didn't seem necessary, but you could use white brazing flux. Sure, I spent $25 in solder over about 5 verticals, but of what significance is that compared to the rest of the effort, to insure a lasting joint? Sta-Silv 5 is probably fine also, with a 1500F liquidus, But I prefer the characteristics of the 15%. Very easy to work with. 73, Drew K3PA ------------------------------ Message: 5 Date: Wed, 12 Oct 2016 08:52:40 -0700 From: "Richard (Rick) Karlquist" <[email protected]> To: "[email protected]" <[email protected]> Subject: Topband: Soldering radials? Message-ID: <[email protected]> Content-Type: text/plain; charset=utf-8; format=flowed I'd like to get the latest thinking from the group on soldering radials. What I currently thinking is as follows: SOLDER SELECTION: 1. Tin lead doesn't hold up in the weather. 2. "Stay Brite" 3% silver solder (97% tin, no lead) is known to work well, but is expensive, and has a considerably higher melting point than 63/37. 3. Lead free plumber's solder obviously works in water pipes, but does it hold up outdoors in the rain? What is the melting point? FLUX SELECTION: 1. Pure rosin. Hardest to work with, but minimum corrosion issues. 2. Activated rosin. Easier to work with. What corrosion issues are there? 3. Acid core plumber's flux. Very easy to work with, very corrosive. Does this hold up in the rain, etc? (I remember the dire warnings that Heathkit manuals had about not using acid core solder, but I guess that doesn't apply to radials.) CRIMPING? Has anyone tried crimping as an alternative to solder? Rick N6RK ------------------------------ Subject: Digest Footer _______________________________________________ Topband mailing list [email protected] http://lists.contesting.com/mailman/listinfo/topband ------------------------------ End of Topband Digest, Vol 166, Issue 8 *************************************** _________________ Topband Reflector Archives - http://www.contesting.com/_topband
