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Scanner antenna ???
Hi Gentlemen,
I have the two capacitors for the bottom matching coil on the Diamond X200a. I have sanded and cleaned the old solder off the sleeve there that looks like chromed brass. I have tried a couple times so far to get the solder to stick to that brass. I have tried some plumbing solder, some plumber's paste (acid flux) I cleaned it, sanded it, filed it and it wont stick to that brass ring part at the bottom. I tried 50/50 solder, rosin core, lead free, and another couple types I am not sure their breakdown but they are electronic solder. Any ideas or tips to try to get that solder to stick? I see it has a nylon insert there of some sort. I am wondering if I am getting it hot enough, I think I am, I am using a 250 watts gun solder type solder iron. Any ideas? Thanks "Jeff Liebermann" wrote in message ... On Tue, 07 May 2013 11:32:57 -0700, Jeff Liebermann wrote: Incidentally, you might find the modifications and analysis of the Diamond X510 antenna of interest: http://pa0fri.home.xs4all.nl/Ant/X510N/Diamond%20X510N%20modification.htm -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#22
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Scanner antenna ???
On Sat, 25 May 2013 07:08:54 -0400, "Tom" wrote:
Hi Gentlemen, I have the two capacitors for the bottom matching coil on the Diamond X200a. I have sanded and cleaned the old solder off the sleeve there that looks like chromed brass. I have tried a couple times so far to get the solder to stick to that brass. I have tried some plumbing solder, some plumber's paste (acid flux) I cleaned it, sanded it, filed it and it wont stick to that brass ring part at the bottom. I tried 50/50 solder, rosin core, lead free, and another couple types I am not sure their breakdown but they are electronic solder. Any ideas or tips to try to get that solder to stick? I see it has a nylon insert there of some sort. I am wondering if I am getting it hot enough, I think I am, I am using a 250 watts gun solder type solder iron. Any ideas? Thanks Your soldering gun tip isn't staying hot enough to solder anything with a large thermal mass. Using 63/37 lead/tin solder, you need a large chisel tip on either a thermostatically controlled soldering iron that will get you up to about 200C. If you have a propane torch with a copper soldering tip (used by plumbers), that will also work. The soldering gun isn't going to work because the copper "wire" tip doesn't have enough mass. As soon as the small tip, touches the large brass heat sink, the temperature of the tip will drop drastically. It's also not themostatically controlled, so you don't know what temperature it's running. Too cold and it doesn't solder. To hot and you vaporize the flux and produce oxidized dross. You need a tip that will get hot, and stay hot at the correct temperature. Don't bother trying with RoHS solder. You might try practicing with an old brass coax connector before attacking the antenna. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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