Author: Jonathan - KE0YBL via TowerTalk <towertalk@contesting.com>
Date: Sat, 25 Jul 2020 06:17:43 +0000
Hi All, I feel like this has been done to death - and yet, the Internet has really been notoriously awful with misinformation for me the past few weeks. I appreciate your thoughts as I work through t
Heliax is essentially plumbing. Quite possibly I simply don't understand, but why is water a problem? How does it penetrate the copper sheath? And if water is a problem, why can't you have a hole i
I ran two runs of 7/8 hardline underground (in KY) for 30 years with no problems. The cable was buried only 6 inches or so, just enough to get it under a mower. It had a low spot-- perhaps three feet
Heliax is essentially plumbing. Quite possibly I simply don't understand, but why is water a problem? How does it penetrate the copper sheath? And if water is a problem, why can't you have a hole i
Heliax is essentially plumbing. Quite possibly I simply don't understand, but why is water a problem? How does it penetrate the copper sheath? And if water is a problem, why can't you have a hole i
I understand all of that. Water vapor will penetrate the walls of the conduit and condense inside, or as you say, get inside via air flow through the conduit. But why is that a problem for the Heli
I don't have the cold weather issues here in coastal California, and there's no human activity where cables run from my shack to my two towers, so all cables, both hard line and control lines, are la
Author: Jonathan - KE0YBL via TowerTalk <towertalk@contesting.com>
Date: Sat, 25 Jul 2020 18:09:20 +0000
Thank you all for taking an interest in my project. To address a couple of the questions that were asked: - I live in Minnesota - fairly cold. - The valley I need to run through is known to have sitt
I understand all of that. Water vapor will penetrate the walls of the conduit and condense inside, or as you say, get inside via air flow through the conduit. But why is that a problem for the Heli
Jonathan, Another idea is to forget about going underground and go overhead. Suspend the cable from a catenary wire rope cable about 8 feet high. You said the run was about 350 feet as I recall. Mayb
Your local soil conditions may be the determining factor. I live in central Maine at 45.2 north latitude, with sandy soil. There is a lot of broken glass and other junk in the soil which I was worrie
Yes. Part of the runs from some RX antennas are done this way. In addition to suspending from a rope, Kellums grips are widely used by telecom and CATV drops. Look for the type with two parts that se
Author: Jonathan - KE0YBL via TowerTalk <towertalk@contesting.com>
Date: Sat, 25 Jul 2020 19:15:59 +0000
Overhead is a novel idea, but probably won't work in this instance. Trees, corners, angles, and an attempt to keep things aesthetic. I'd consider above-ground, but it'd always be in the way. I speak
Author: Kevin Kidd <kkbroadcastengineering@gmail.com>
Date: Sat, 25 Jul 2020 18:55:08 -0500
A few observations... Splices are "weather proof" not water proof and should never, ever, ever, ever, never be placed below grade or in a flooded conduit. They will too often leak hanging on a tower,
Author: Jonathan - KE0YBL via TowerTalk <towertalk@contesting.com>
Date: Sun, 26 Jul 2020 00:15:55 +0000
Thanks, appreciate the local feedback. Not to get too off topic, but I'm planning to run the conduit to pull boxes/hand holes on each end, then short runs to the shack and tower. Water management, ea
Gotta push back on the conclusion here. I would replace the "splices should never, ever, ever, ever, ever be placed below grade or in a flooded conduit" with something like "should never be placed in
I understand all of that. Water vapor will penetrate the walls of the conduit and condense inside, or as you say, get inside via air flow through the conduit. But why is that a problem for the Heli
Author: Kevin Kidd <kkbroadcastengineering@gmail.com>
Date: Sun, 26 Jul 2020 13:32:23 -0500
Good points but I have dug up too many failed attempts at below grade waterproofing to go with anything less than my original statement. Giant warts of butyl and miles of tape, PVC pipe pumped full o
There's no luck involved. Show me one that failed and I'll show you what was done wrong, it will be obvious. It's not rocket science, yet I see bad examples all the time. It's apparently beyond some
There should be a saying - "there is no such thing as too large a coax junction box." ;) Antennas & towers seem to propagate after a few years. I absolutely wouldn't used buried boxes. If you are pul