I was wondering why I did not get any follow up emails to my original. I had made an additional post, but in error, I only hit reply and it never went back to the group. So trying again. As a remin
I have had traces on the ends of hardline that looked like calcium or maybe salt deposits. Slightly off-color, almost invisible, They conduct from center to shield. It is difficult to scrape them off
I am not sure what Heliax cable you have but if it is LDF5 I would toss the homebrew connectors and use a L45U or L45P UHF connector. John KK9A I was wondering why I did not get any follow up emails
Doug, Heliax uses closed cell foam so the dielectric itself doesn't wick moisture, but there are voids between the dielectric and shield that can wick water. You must ensure a seal at the ends of cor
I slept through it. Sorry. First suggestion is to do a good TDR on the line. If you don't own instrumentation to do it, cast about among local techie types for someone to bring his instrument over an
The Rig Expert AA-600 has TDR capabilities. I dont know about the other, lower frequency range models. K4TO _______________________________________________ ___________________________________________
Hi Doug, We had a similar issue with an LDF5-50 feeder at K6IDX, except that the line had been in place for more than 15 years IIRC. The connectors had been installed by a celltower professional, wit
I have a 170' length of LDF5-50A (donated) to put up soon for my 2 meter repeater. I purchased NOS Andrew LDF5-50A DIN connectors at a Hamfest for $20 each. These will be connected at each end to And
Keith, Did you look at https://www.alibaba.com/product-detail/1-2-Cable-DIN-7-16_60222039246.html ? We at PI4CC used them. A video where I repace a bad connector up the tower is at https://www.pi4cc.
Most instrumentation that hams can afford take the inverse FFT of a swept measurement of the line for TDR. This a quite solid method, widely used in pro audio for at least 35 years. To get good resol
Peter, Nice. I do not see use of these on any installation in the Houston/Gulf Coast area. Maybe we are just cheap. The video feed was really slow. I went to bed, and replayed after it was fully down
I'm digging that setup where you inject the waterproofing into the back half of the connector.... Those are 7/17 DIN connectors? ______________________ Clay Autery, KY5G MONTAC Enterprises (318) 518-
Here is a description of the connectors I am using: https://www.rfparts.com/connectors-heliax/connectors-78heliax/78helicon-ldf/716f78r.html Keith --Original Message-- From: TowerTalk [mailto:towerta
Those are NICE... but I want to know about the ones Peter used with the threaded injection point on the back. Seems like a much better way nto make sure there are no voids in your "silicone" air/mois
Hi Keith A few more video's of this type connector and sealing: https://www.youtube.com/watch?v=9cDrDOmPRhc https://youtu.be/DK3wfQ6SzqM They are made for 1/4 to 1-5/8" type 7/16 and also N Peter ht