Re: [TowerTalk] Need Quality RG6 cable

[Artek Manuals <Manuals@ArtekManuals.com>]

Dave

I am in the process of rebuilding my array of Coax Reversible BOGs and I 
just bought a large quantity of RG-59U from Davis RF .
http://www.davisrf.com/rgcoax.php

The measured velelocity factor was around 79 ( probably really 78 my 
measurement technique was quick and dirty)
The reason I chose RG59 over RG6 was :
1) It is near impossible to find quality female F connectors that wont 
become intermittent
2) It is equally as hard to find crimp on PL259 Males of the right size 
for RG6. (I am switching all my F connections over the PL259)
3) RG6 is NOT Solderable, RG-59 is SOLDERABLE
4) You can find appropriate good quality crimp on or solder connectors 
with the appropriate reducers for RG59 from a number of sources
Dave NR1DX

On 3/11/2021 9:11 AM, Artek Manuals wrote:
> Dave
>
> will 75 ohm work for you rather than 72?
>
> Dave
> NR1DX
>
> On 3/11/2021 8:57 AM, Dave Sublette wrote:
> > Good morning,
> >
> > Each dipole of my 80 meter four square dipole array is fed with 72 ohm
> > coax.  Yes, they are full length dipoles suspended vertially around a 
> > 150
> > foot tower.  One end of each dipole is at the top.  The centers are 
> > pulled
> > out until the feed points are 46.5 feet from the center.  The other 
> > half of
> > the dipoles is allowed to droop and loop down with the ends tied 15 feet
> > above ground to allow mowing, etc... It ends up as a rough diamond 
> > shape.
> > And, yes it works.  It has worked well for over 20 years. The control 
> > box
> > is the original Comtek that does work with dipoles.  The new version 
> > manual
> > claims it doesn't.  Perhaps they have altered it by now.
> >
> > I gave a crude description to start because I figured there would be
> > questions.  The point of this email, though, is to get your
> > recommendation for good quality 72 ohm coax with foam dielectric for 
> > a V/F
> > of 78% or so.  It has to be foam in order that the feedline be long 
> > enough
> > to reach the center of the array where the control box is located. The
> > connectors on the box are SO-239.  The PL259 can be soldered or 
> > crimped, I
> > don't care. But if soldered, shielding must be copper.
> >
> > So 72 ohms, 78% v/f, good quality.  Where to get it?
> >
> > Googling yields all sorts of cable suppliers, but we all know the 
> > quality
> > varies.  I would hope one or more of you has some real world 
> > experience to
> > share.
> >
> > Thanks & 73,
> >
> > Dave, K4TO
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
--
Dave Manuals@ArtekManuals.com www.ArtekManuals.com

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