[amsat-bb] Exciting Coax

[Burns Fisher]

You know how the phone company used to keep paper-insulate thousand (or
whatever) conductor, lead sheath cables dry inside?  Dry nitrogen pumped in
from the central office, and extra bottles soldered in when leaks were
found :-)

On Tue, Jan 23, 2018 at 4:35 PM, Bob- W7LRD <w7lrd at comcast.net> wrote:

> Some years ago I had some 9913, well sealed (so I thought).  Gradually the
> swr crept up.  Without a thought, it got trashed and was replaced with LMR
> 400.  Yes the idea of syringing water out of 9913 can work, also a constant
> blower blowing into the 9913 can work, we can also insert small sponges
> into the 9913 and replace them when necessary, or we can have the 9913
> running down hill the whole way so the water can drip out (makes for a wet
> ham shack), or we can build a roof over the 9913 to keep it out of the
> moisture.  I could go on and on and I am sure many of you have even  more
> creative ideas!  Am I being facetious?  Of course I am!  Hams can be
> "cheap" bunch but there is place where a few extra bucks is money well
> spent.  Anything above 70cm I use LMR600.  Just having fun today!
>
> 73 Bob W7LRD
>
> > On January 23, 2018 at 1:03 PM Greg D wrote:
> >
> >
> >     Yes, but wet 9913 has a loss of ?
> >
> >     While searching for some hardline to replace my 9913 run some years
> ago,
> >     I resorted to drilling a hole in the bottom end of the cable, and
> >     sucking out the water periodically with a syringe. It was not an
> >     insignificant amount, and made a huge difference. Eventually found
> >     someone with some leftover LDF4-50A hardline, and made a swap with
> him
> >     for a UHF beam antenna I had extra. Best deal on the planet.
> >
> >     If you can truly keep your 9913 dry inside, by all means, go for it.
> >     But how do you know it's still dry? To me, it's not worth the
> trouble.
> >     If you like that size cable, I'd go with LMR-400 instead of either
> >     variety of 9913.
> >
> >     Greg KO6TH
> >
> >
> >     Glenn Miller - AA5PK wrote:
> >
> >         > > 9913F7 has nearly 10 dB attenuation/100 feet at 400 MHz.
> 9913 has
> > >         about 2.6 dB.
> > >
> > >         https://edesk.belden.com/products/techdata/metric/pdf/
> 9913F7.pdf
> > >         https://catalog.belden.com/techdata/EN/9913_techdata.pdf
> > >
> > >         I know which I'd choose.
> > >
> > >         -----Original Message----- From: Norm n3ykf Sent: Tuesday,
> January 23,
> > >         2018 1:09 PM To: Greg D Cc: <, amsat-bb at amsat.org mailto:
> amsat-bb at amsat.org >, ;
> > >         anderson58625 Subject: Re: [amsat-bb] Exciting Coax
> > >         9913 is not 9913F7
> > >
> > >         Google is your friend, or perhaps if one is lazy, not.
> > >
> > >         Norm n3ykf
> > >
> > >         Subscription settings: http://www.amsat.org/mailman/
> listinfo/amsat-bb
> > >         _______________________________________________
> > >         Sent via AMSAT-BB at amsat.org mailto:AMSAT-BB at amsat.org .
> AMSAT-NA makes this open forum available
> > >         to all interested persons worldwide without requiring
> membership.
> > >         Opinions expressed
> > >         are solely those of the author, and do not reflect the
> official views
> > >         of AMSAT-NA.
> > >         Not an AMSAT-NA member? Join now to support the amateur
> satellite
> > >         program!
> > >         Subscription settings: http://www.amsat.org/mailman/
> listinfo/amsat-bb
> > >
> > >     >     _______________________________________________
> >     Sent via AMSAT-BB at amsat.org mailto:AMSAT-BB at amsat.org . AMSAT-NA
> makes this open forum available
> >     to all interested persons worldwide without requiring membership.
> Opinions expressed
> >     are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> >     Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> >     Subscription settings: http://www.amsat.org/mailman/
> listinfo/amsat-bb
> >
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>