Thanks for the response... Not sure why you and the other guy both recommended RG-6 75-Ohm cable and F-connectors, when the nominal impedance of literally everything else in the system is 50 Ohm, including the antenna and the HP GPS Distribution Amp.... And then adding N to F adapters?
Doesn't make any sense unless one has $$ as a top priority, already has a spool of RG-6 quad shield, etc... but I specifically stated that $$ is not a top priority.... Not really even in the top 5 or 10... The whole point of this exercise is to put up a semi-permanent SINGLE antenna/feed-line install that will supply all 4 ports of the HP amp with the least compromised signal within reason.... 4 now, and 8 whenever I can find the HP 8-way distro amp with external power input. Strain relief solution: Really depends upon which cable stock I end up using.... Obviously, the larger the cable, the more weight will be suspended under the antenna (approx. 38 feet, depending on where I pull the cable out of the mast at the bottom. (The mast is on a tilt-base of my own construction.... which brings up a valid consideration. it is already a chore to walk the mast up manually. The more weight added at the top and inside the mast, the more difficult a manual walk-up will be. I'd prefer to keep this a manual tilt for now... at least until I add the tri-band vertical dipole) LMR-400 would be less than 4 lbs total weight... I'd likely suspend the cable by the connector alone. (although, it wouldn't be JUST the crimp... The connector would have at a minimum, 1 layer of adhesive-lined shrink tube... probably 2, with the second, overlapping. Then a nice wrap of self-fusing tape and then electrical tape over that. Even LMR-600 could be suspended by the connector alone, at 5 lbs max in the 38 foot max vertical section. I do have several methods of secondary suspension within the top (and/or second) mast section though if I decide I need it. Also prefer to keep all the connectors N-type as much as possible since that is the station standard. 73, ______________________ Clay Autery, KY5G On 9/2/2017 6:07 PM, Mike Naruta AA8K wrote: > > Clay, you may wish to consider using a quality RG-6 with F > connectors. Grounding blocks are readily available for the base of > your mast and the entrance to your house. Also, off-the-shelf > over-voltage protectors (Zap-Tech) are available. I even found an > F-to-N adapter for the antenna on Amazon. Watch out for the ones with > metric N threads though. > > For my 25 meter run I was going to use an existing one inch Heliax, > but pulled a run of Belden RG-6 instead after learning that Trimble > used RG-6. > > It worked well directly connected to a Trimble Thunderbolt; now it is > connected to a Symmetricon 58535A GPS L1 distribution amplifier. > > > My Blitzortung System Red station has been running fine in my attic > (Michigan) on a Motorola 97 Oncore patch antenna fastened against the > roof underside. It is looking through wood, shingles, and nails (and > a tree and antennas and utility lines). > > > How are you planning to do strain-relief on the vertical run of coax > inside of your mast? > > > Mike - AA8K > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
