[time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

[William H. Fite]

I've gotten some very poor quality RG6 in the past, despite having
purchased it from ostensibly reputable sources. Now I use
honest-to-goodness Times Microwave LMR400.

I have terminated LMR400 with BNC, PL259, SO239, and N connectors and never
had one fail. It is not at all difficult to do.

"The bitterness of poor quality remains long after the sweetness of low
price has been forgotten."

Bill


On Wednesday, April 20, 2016, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> RG-6 Quad Shield should be fine as long as it’s meeting the published
> specs. The advantage of LRM-400 is that you likely *know* where it came
> from and what the specs are.
>
> If you decide to split the antenna between GPSDO’s, a powered splitter is
> a really good idea. Each time you split another 2 ways, you loose 3 db. Get
> at least a 4 way splitter ….
>
> Bob
>
> > On Apr 20, 2016, at 4:41 PM, Ryan Stasel <rstasel at uoregon.edu
> <javascript:;>> wrote:
> >
> > All,
> >
> > I’m going to be installing a “permanent” antenna at home, and will need
> a run of about 100ft to get from my workstation, to the mast I’ll be
> mounting the antenna on (Symmetricom 58532A). I’ve seen some indication
> that both the antenna and the Trimble Thunderbolt won’t have any issues
> with running over 75ohm cable, but thought I’d ask the “experts” whether
> I’d be better off with some RG6 Quad-shield, or LMR400 (I’ve got a local
> source that doesn’t know what LMR400 is, or what it’s worth)?
> >
> > Obviously I’d prefer to run and crimp RG6, but if I’d be better off with
> LMR400, I’d rather run that now than go back into the crawlspace again. =)
> >
> > Also, if it helps, I’ll probably have a Symmetricom/HP 58516A at/near
> the T-bolt so I can experiment with other GPS(DO)s as well (especially one
> of the JRMiller boards I bought and built (but never finished) ages ago).
> Which brings the question, will the T-bolt provide the oomph needed to
> power that splitter and the antenna over that length of cable?
> >
> > Thanks!
> >
> > -Ryan Stasel
> >
> >
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