Re: Your posting on AMSAT
I saw your posting on AMSAT-BB about building a quadfilar. I have those files and have been experimenting with various omnis for SAT work. So far diploes, verticals, turnstiles, and a moxon. The quadfilar was next on my list. I even scored some copper clad coax for the task. For 70 cm it seems pretty tough to do the bending and get it right. May I ask how you did that (a tubing bender, pliers, other) and if you heated the copper wire first like they suggest.
Anneal the copper tubing for the three copper tubing filars, and it is very easy to shape, simply mark the dimensions on the tubing, and bend away...the length is much more important than the diameter of the bends.
And make good solder joints...heat proof dialectric on the coax one,. of course....teflon, and there are some others...
Pulling for P3E...
Thanks. So annealing is the must. What did you use to heat it up? I'll be using #8 wire. Did you have to use a bender of any type or just pliers?
----- Original Message ----- From: "Dave Guimont" dguimon1@san.rr.com To: "Mike Ryan" mryan301@comcast.net Cc: amsat-bb@amsat.org Sent: Sunday, December 07, 2008 11:04 PM Subject: Re: Your posting on AMSAT
I saw your posting on AMSAT-BB about building a quadfilar. I have those files and have been experimenting with various omnis for SAT work. So far diploes, verticals, turnstiles, and a moxon. The quadfilar was next on my list. I even scored some copper clad coax for the task. For 70 cm it seems pretty tough to do the bending and get it right. May I ask how you did that (a tubing bender, pliers, other) and if you heated the copper wire first like they suggest.
Anneal the copper tubing for the three copper tubing filars, and it is very easy to shape, simply mark the dimensions on the tubing, and bend away...the length is much more important than the diameter of the bends.
And make good solder joints...heat proof dialectric on the coax one,. of course....teflon, and there are some others...
Pulling for P3E...
The last time I did this, I used a small propane torch. Jim KQ6EA
--- On Sun, 12/7/08, Mike Ryan mryan301@comcast.net wrote:
From: Mike Ryan mryan301@comcast.net Subject: [amsat-bb] Re: Your posting on AMSAT To: "Dave Guimont" dguimon1@san.rr.com Cc: amsat-bb@amsat.org Date: Sunday, December 7, 2008, 8:08 PM Thanks. So annealing is the must. What did you use to heat it up? I'll be using #8 wire. Did you have to use a bender of any type or just pliers?
----- Original Message ----- From: "Dave Guimont" dguimon1@san.rr.com To: "Mike Ryan" mryan301@comcast.net Cc: amsat-bb@amsat.org Sent: Sunday, December 07, 2008 11:04 PM Subject: Re: Your posting on AMSAT
I saw your posting on AMSAT-BB about building a
quadfilar. I have those
files and have been experimenting with various
omnis for SAT work. So far
diploes, verticals, turnstiles, and a moxon. The
quadfilar was next on my
list. I even scored some copper clad coax for the
task. For 70 cm it seems
pretty tough to do the bending and get it right.
May I ask how you did
that (a tubing bender, pliers, other) and if you
heated the copper wire
first like they suggest.
Anneal the copper tubing for the three copper tubing
filars, and it is
very easy to shape, simply mark the dimensions on the
tubing, and bend
away...the length is much more important than the
diameter of the bends.
And make good solder joints...heat proof dialectric on
the coax one,. of
course....teflon, and there are some others...
Pulling for P3E...
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participants (3)
-
Dave Guimont -
Jim Jerzycke -
Mike Ryan