The only silversolder I've ever seen was about as close to brazing as you
could get without actually brazing. I did a lot of it over the years,
attaching pure silver coils to water blocks. The coils were of the pancake
variety and used for float zone refining of Silicon in a high vacuum.
>
> Aw come on guys, the guy is silver braising. This requires at the minimum
> a MAPP gas torch, or better a Oxygen/Acetelene torch .. this is the stuff
I don't think you could have used one on the little MAP torches unless it
was used with Oxygen and a welding type tip.
> that the Air Conditioner guys use to "weld" the A/C lines with. This is
> NOT a low temperature solder process.
Nope, As you say it's quite a high temperature and low resistance. Those
little pancake coils handled a good many thousand watts of RF to melt that
silicon.
Roger Halstead (K8RI, EN73 & ARRL Life Member)
N833R, World's Oldest Debonair (S# CD-2)
www.rogerhalstead.com
>
> Sid N0OBM
>
>
> At 21:35 07/24/2004, Michael Tope wrote:
>
> >What alloy are you using, Tom. Most of the stuff you can buy at
> >home box stores is for plumbing applications (96%Tin, 4% Silver).
> >This stuff has a low melting point and the resistance is fairly
> >high (similar to tin/lead solder). Some of the model railroad sites
> >I found seem to be describing a higher temperature brazing like
> >process using alloys with a much higher silver content for things
> >like boiler assemblies. Sounds like you are talking about something
> >similar which would make alot a sense for bonding a tower
> >grounding system (low resistance, high melting point).
> >
> >Do you have a source and a recommended flux? I am planning
> >to redo my grounding/radial system when we have our landscaping
> >done later this year, so I am interested in different options for
> >bonding things together.
> >
> >Thanks,
> >
> >Mike, W4EF.........................................................
> >
> >----- Original Message -----
> >From: "Tom Rauch" <w8ji@contesting.com>
> >To: <K7LXC@aol.com>; ""Dudley Chapman"" <chief@thechief.com>;
> ><towertalk@contesting.com>
> >Sent: Saturday, July 24, 2004 6:40 PM
> >Subject: Re: [TowerTalk] Lightning protection questions.
> >
> >
> > > > A question - why do you use silver solder? Isn't that
> > > susceptible to melting when it takes a hit? It's also
> > > contrary to the National Electrical Code using mechanical or
> > > exothermic bonding
> > >
> > >
> > > It's old habit Steve. I silver soldered at AM broadcast
> > > stations for years, and never saw a problem. I silver solder
> > > here, and never have a joint come apart. The flashing strap
> > > from 300ft tower across the insulator is silver soldered
> > > with just a "fold" that is flooded, and it takes hit after
> > > hit. I can't ever in my life remember a silver solder
> > > connection coming undone, because to melt the solder you
> > > nearly have to melt the copper. I'm not recommending anyone
> > > do anything but what the code says, but my guess is there
> > > are all sorts of silver solders and they are afraid people
> > > will use the stuff made for plumbing. Many people, I'm sure,
> > > can't even solder properly with tin/lead. It makes sense to
> > > me they made the code like they did, almost anyone can
> > > tighten a bolt.
> > >
> > > It would make sense for the codes to require a "can't miss"
> > > thing. After all, a good solder connection is many times
> > > better than a wire nut. I can't think of a worse thing than
> > > using a little spring to hold two wires together.
> > >
> > > Why is soldering house wiring against code? Probably because
> > > most electricians can't solder. As long as I have my
> > > acetylene oxygen torch set, I'll probably never do anything
> > > else.
> > >
> > > 73 Tom
> > >
> > >
> > > _______________________________________________
> > >
> > > See: http://www.mscomputer.com for "Self Supporting Towers",
"Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any
> >questions and ask for Sherman, W2FLA.
> > >
> > > _______________________________________________
> > > TowerTalk mailing list
> > > TowerTalk@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
> >
> >
> >
> >
> >
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> >any questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
> >TowerTalk mailing list
> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|