GPS Antenna Feed Line Decision
Cheap RG-59 cable coax is more than sufficient for 50 .. 150+ feet (unless you are doing geodetic level GPS work). It is recommended by several GPSDO makers. The 50/75 ohm mismatch is not an issue. No need to waste money on fancy pants artisanal luxury coax.
True, though a friend of mine used LMR-400.
On Saturday, September 2, 2017, Mark Sims holrum@hotmail.com wrote:
Cheap RG-59 cable coax is more than sufficient for 50 .. 150+ feet (unless
you are doing geodetic level GPS work). It is recommended by several GPSDO
makers. The 50/75 ohm mismatch is not an issue. No need to waste money on
fancy pants artisanal luxury coax.
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--
I wanted to be a rocket scientist but my advisor said I'd be wasting my
talent.
One of my "Hockey Puck" antennas has about 50' of RG-174 on it and I have
seen no problems locking up.
73, Dick, W1KSZ
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From: time-nuts time-nuts-bounces@febo.com on behalf of William H. Fite omniryx@gmail.com
Sent: Saturday, September 2, 2017 9:33:09 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS Antenna Feed Line Decision
True, though a friend of mine used LMR-400.
On Saturday, September 2, 2017, Mark Sims holrum@hotmail.com wrote:
Cheap RG-59 cable coax is more than sufficient for 50 .. 150+ feet (unless
you are doing geodetic level GPS work). It is recommended by several GPSDO
makers. The 50/75 ohm mismatch is not an issue. No need to waste money on
fancy pants artisanal luxury coax.
time-nuts mailing list -- time-nuts@febo.com javascript:;
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
--
I wanted to be a rocket scientist but my advisor said I'd be wasting my
talent.
time-nuts mailing list -- time-nuts@febo.com
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and follow the instructions there.
Thank you for your response. Again, money is not the issue or
priority. Knowing that I am getting the best signal within reason (my
reason <wink and grin> )
Tangentially, you have provided me with the information I require. As I
do not know what I will hang off the end of that antenna in the future
and I am in fact going to be doing some measurement/experimentation, I
will use something better than RG-59 or RG-6 (even if it is only
"better" in my opinion).
I am an incurable over-engineer... and this IS "Time NUTS" after all.
<smile>
Thank to you AND to ALL who have made recommendations thusfar....
especially the ones with whom I disagree. Those are the recommendations
that keep me from completely abandoning rational decision-making. <big
grin>
73,
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 9/2/2017 3:27 PM, Mark Sims wrote:
Cheap RG-59 cable coax is more than sufficient for 50 .. 150+ feet (unless you are doing geodetic level GPS work). It is recommended by several GPSDO makers. The 50/75 ohm mismatch is not an issue. No need to waste money on fancy pants artisanal luxury coax.
Hi.
The last time I looked at upgrading my GPS antenna feed line (I'm currently using RG58 style cable) I spent some time looking at the temperature vs propagation delay characteristics of various cables.
I also picked up a spool of cloned "LMR400 style" cable but ended up using that for my amateur radio hobby. If I was going to throw more money at my Time Nuts GPS feed line I'd probably look for a "hard line" style cable with a favourable temperature vs propagation delay characteristic. For a basic installation I expect I would just use RG6 style cable.
Good luck.
Mark S
mark@alignedsolutions.com
604 762 4099
On Sep 3, 2017, at 9:57 AM, Clay Autery cautery@montac.com wrote:
Thank you for your response. Again, money is not the issue or
priority. Knowing that I am getting the best signal within reason (my
reason <wink and grin> )
Tangentially, you have provided me with the information I require. As I
do not know what I will hang off the end of that antenna in the future
and I am in fact going to be doing some measurement/experimentation, I
will use something better than RG-59 or RG-6 (even if it is only
"better" in my opinion).
I am an incurable over-engineer... and this IS "Time NUTS" after all.
<smile>
Thank to you AND to ALL who have made recommendations thusfar....
especially the ones with whom I disagree. Those are the recommendations
that keep me from completely abandoning rational decision-making. <big
grin>
73,
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 9/2/2017 3:27 PM, Mark Sims wrote:
Cheap RG-59 cable coax is more than sufficient for 50 .. 150+ feet (unless you are doing geodetic level GPS work). It is recommended by several GPSDO makers. The 50/75 ohm mismatch is not an issue. No need to waste money on fancy pants artisanal luxury coax.
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