Jim.
No problem on the UHF Male - they are now stock
Another interesting comparison, considering various references to 1/2 "
Heliax(TM), either LD4 or FSJ4: Assuming the use of 10 ft of stranded
center conductor around a rotor vs 20 ft of either of the above solid
center materials, to allow for lesser breakage risk from bending, the 217
flex is a clear winner over FSJ4 and about equal to LD4 in loss and no
contest in cost. 214 and 393 don't even compete in either category.
(Figures based on 100MHz for easy math, so 30 MHz is a no-brainer.)
73,
Press Jones, N8UG - The Wireman, Inc., 261 Pittman Rd, Landrum, SC 29356
<Press@thewireman.com> or <orders@thewireman.com>
800-727-WIRE(9473)(sales)
Tech help 864-895-4195, fax 864-895-5811.Full catalog, images,
descriptions, coax specs,
ordering, at http:\\www.thewireman.com and super deals, specials,
close-outs etc.,
at THE WIRELINE. Check the CALENDAR to find us at a hamfest!
On Fri, 16 Mar 2001 07:38:43 +0100 Jan.E.Holm@telia.se writes:
>
> Think RG214 is marginal for 1500 W, at least on the high bands.
> The RG217 cable is an excelent choice, however connectors might
> be a problem, if you want to use UHF that is, I only know of N
> and C connectors for that cable. However if you know how to
> solder you can apply an old fashion UHF solder type connector
> to it, works excelent.
> For cables up and down towers and interconnections betwen
> antennas RG217 is perfect. I always use RG217 on tower down
> to ground and from there 7/8 " hard line.
> By the way, RG217 is rated for around 1000 W on 144 MHz, if
> I remember correctly.
> I would say that even the Andrews Super Flex can be used, at
> least if you dont make the rotor loop too tight, however below
> 30 MHz I see no need for Super Flex, RG217 will take many many
> KW´s on 28 MHz and down.
>
> 73, Jim SM2EKM
>
------------------------------------------------------------------------
> -------------------------------
> -----Ursprungligt meddelande-----
> Från: jreisert@jlc.net [SMTP:jreisert@jlc.net]
> Skickat: den 16 mars 2001 00:57
> Till: billwall@bellsouth.net; k4rv@mindspring.com;
> towertalk@contesting.com
> Ämne: Re: [TowerTalk] flexible coax
>
> Tom,
>
> I prefer RG214 coax for rotor loops. It's not cheap (although very
> common
> on the surplus market-especially in short lengths and affordable).
> It
> is
> relatively flexible but also has two shields making it much sturdier
> than
> RG 213. I get several years of tough service out of it. Usually the
> connectors fail before the coax.
>
> Andrews so called flexible cables to me are a misnomer. True, they
> can
> be
> flexed, but only a few times! They are great during installations
> where
> the
> cable must be bent in peculiar shape but NOT FOR CONSTANTLY MOVING
> ROTORS!
>
> 73,
>
> Joe, W1JR
>
>
>
>
>
>
> At 09:39 AM 3/15/01 -0500, bill wall wrote:
> >Hi all:
> >Andrews has a cable named flexible and I would also ask Press.
> > Bill KC4UZ
> >----- Original Message -----
> >From: "Sain'T Tom" <k4rv@mindspring.com>
> >To: "tower talk" <towertalk@contesting.com>
> >Sent: Thursday, March 15, 2001 8:36 AM
> >Subject: [TowerTalk] flexible coax
> >
> >
> > > What is the biggest, lowest loss coax that is flexible enough to
> use in a
> > > rotor loop?
> > >
> > > What coax is typically used in a rotating tower installation,
> and
> how is
> >it
> > > installed so as not to drag along the ground.
> > >
> > > Thanks
> > > Tom K4RV
> > >
> > >
> > >
> > > --
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> > >
> > >
> >
> >
> >--
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>
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> <<Fil: Re_ [TowerTalk] flexible coax.TXT>>
>
>
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