RE: [TowerTalk] Using Belden 9913 on a crankup?

[Dino Darling <k6rix@earthlink.net>]

CableXperts has probably one of the best products on the market!  They use 
Teflon insulated, gold tipped, silver connectors.  They also use heat 
shrink tubing at the connection which helps seal out water and give support 
to the joint.  AND THEY TEST EVERY ASSEMBLY!!!

http://www.cablexperts.com/

I highly recommend their CXP1318FX cable assemblies!  I have NO bowing 
issues with this cable!

Dino - K6RIX


At 01:33 PM 04/27/2004 -0400, you wrote:
> I would not use 9913 on a crankup tower. It's way too stiff and will bow
> out. Over time, the constant bending will cause the center conductor to
> migrate, affecting the cable impedance. I initially used the much more
> flexible Times Microwave LMR-400UF, but even that was too stiff. I had a
> near-disaster when the LMR bowed out, swung around the tower and got caught
> on the motor housing (I have a remote-controlled tower and can't see it from
> the control position.) Ever since, I've used RG-213 with no problems. That
> should be fine on a 50-foot tower. However, some comparisons between RG-213
> and Buryflex revealed that the latter is actually more flexible. It also has
> much lower loss. You can get Buryflex from Radioware
> (http://www.radio-ware.com/).
>
> 73, Dick WC1M
>
> > -----Original Message-----
> > From: Tower (K8RI) [mailto:tower@rogerhalstead.com]
> > Sent: Monday, April 26, 2004 10:11 PM
> > To: coulter@bellsouth.net; towertalk@contesting.com
> > Subject: Re: [TowerTalk] Using Belden 9913 on a crankup?
> >
> >
> > I used 9913 for years and then gave it all away after one
> > lightening strike blew off the water proofing.  I figured it
> > just wasn't worth the risk.
> >
> > OTOH 9913 is not a good cable to use where flexing is
> > encountered.  The center conductor can migrate off center and
> > it needs to make wide radius bends if long life is expected.
> >
> > I much prefer LMR 400 to 9913. It's slightly cheaper, or has
> > been. It's one or two tenths of a db less loss and fits the
> > same connectors.  Both fit PL259s. LMR 400 is more rugged and
> > can make relatively short radius bends. Much shorter bends
> > with reliability than 9913. I believe (without taking the
> > time to look it up) that LMR-400 extraflex has about the same
> > loss as regular 9913, but is more expensive.
> >
> > I used 9913 for years without a problem, or at least I never
> > noticed any.  I liked it, but finding water running out of my
> > rig after the lightening blew off all the water proofing was
> > enough to cause a rapid switch to something better.  I'd
> > probably still be using it had that not happened.
> >
> > You'll also most likely find hams who have used the stuff in
> > flexing situations with no problems (there are usually
> > exceptions to most any set of
> > circumstances)
> >
> > Good Luck,
> >
> > Roger Halstead (K8RI, EN73 & ARRL Life Member)
> > N833R, World's Oldest Debonair (S# CD-2)
> > www.rogerhalstead.com
> >
> >
> > > Could somebody tell me if Belden 9913(not 9913 flex)is usable on a
> > > crankup tower. What I am interested in, is if it is bendable enough
> > > when the tower
> > is
> > > cranked down or will it bow out too much? Should I go to a more
> > > flexable
> > cable
> > > for the run up the tower, or is it workable? This is for a 51 ft.
> > > crankup. Thanks for your help.
> > >
> > >                             Todd
> > >                             N4JRZ
> > >
> > >
> > > _______________________________________________
> > >
> > > 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

Dino...k6rix@earthlink.net 


_______________________________________________

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.

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