[time-nuts] Subject change - sources for coax cable and other RF stuff - was RG6 or LMR400 for GPS Antenna

[DaveH]

If you are looking at getting some LMR400, Ham Radio Outlet has a branch in
Portland and they are really nice people to deal with.

http://www.hamradio.com/

I have zero financial interest outside of being a very happy customer.

The Wire Man is also very very good.

http://thewireman.com/index.html


Dave
 

> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf 
> Of Ryan Stasel
> Sent: Wednesday, April 20, 2016 18:03
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] RG6 or LMR400 for GPS Antenna 
> (Symmetricom 58532A and T-bolt)
> 
> Bob/Paul,
> 
> Thanks. And there's the rub... Who knows what the specs are 
> on "generic" RG6 QS. I'll see what my seller wants for their 
> LMR400, but otherwise yeah, RG6 is just easier. I have both 
> compression and crimp connectors for it, including some RG6 
> N-connectors (yeah, they're probably for LMR300, but they work). 
> 
> Other question: any tips for the exterior N connection? I can 
> "weatherproof" the actual cable-connector crimp, but I'm 
> curious if anyone bothers to "lube" the N connector to keep 
> moisture from otherwise seizing it up. 
> 
> Thanks!
> 
> Ryan Stasel
> IT Operations Manager, SOJC
> University of Oregon
> 
> Sent from my iPhone
> 
> > On Apr 20, 2016, at 17:00, 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> 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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