Hans, the VF of coax or any cable is greatly depends on what is in contact with the skin of the conductor. Air, semi air, foam, solid dielectrics, will each will have a different effect on the skin.
I used 9913 to feed a TH-7 at 50 feet for over 20 years with no water intrusion. I did however use a rotor loop with solid dielectric, a double female UHF connector to splice the two PL-259 connector
My solution for the bulkhead feed-through and ground window challenge for my basement shack is to remove one pane of a two-pane basement window and replace it with a Lexan / plastic replacement panel
A Butternut HF-2V with 160 meter mod kit and top loaded (all 40 Meter loading shorted out) over two dozen 66 foot radials over glacial moraine pond bottom black soil over water bearing clay, has serv
For greater precision, say about 0.33 degrees use the Polaris - Kochab method as explained in US ARMY FM 6-50 (http://www.globalsecurity.org/military/library/policy/army/fm/6-50/Ch5.htm). Many years
For my part, Polaris - Kochab was just a piece from my working past sitting unused until the discussion started in the direction of greater precision and higher education. If one is going to use Pola
My response with the link to FM 6-50, was as I explained to one here who contacted me directly, was done with tongue firmly planted in my cheek. I know the process well, but use the generally North r
I put Array Solutions Surge Arrestors AS-303U (formerly I.C.E. Protectors) at the Ground Window for Co-axial cables coming into the radio shack. The AS-303U are more than gas tube protectors. I also
Patrick, It'd be much better if you could replace the barbed wire fence with a split rail or other non-conductive material fence. I once stapled hook up wire along the top rail of a split rail fence
Since the Skyhawk was mentioned, as well as the subject of ice and wind, it may be that ice loading and the lack of a truss system will lead to catastrophic failure of the Skyhawk boom. I have pictur
TriFlow may be an alternative to WD-40, ATF, etc. Tri-Flow was the the rust buster of choice in the maintenance shop I worked at 30 plus years ago. 73 & DX, Gary - AB9M Patrick, is this the Universit
Patrick, I am NOT affiliated with Triflow Lubricants and do not receive any manner of compensation for mentioning their product on this reflector. Neither am I emotionally attached to the use of TriF
Can we put 2098412985@qq.com and a "member" using sina.com or sina.cn on moderated status? It is possible to "right click" on an email to open an action box, right click on properties, right click on
My email program will block email from sina.com if its direct but not when it rides in on towertalk@contesting.com . 73 & DX, Gary - AB9M ~-- _______________________________________________ _________
I have a delete key and use it, AFTER I make sure the email isn't malware. 73 & DX, Gary - AB9M Is it such a big deal? you have a DELETE KEY. There are more important things in this world to worry ab
The reality is that a "thrust bearing" like the ones sold by Rohn really don't need lubrication for one RPM and typical downward antenna loads. As long as there is a downward load on a "dry" TB3 or T
See https://www.youtube.com/watch?v=nL0EjOmuPwY for info from a local wind farm 73 & DX, Gary - AB9M --Original Message-- From: Roger (K8RI) on TT Sent: Sunday, June 21, 2015 11:08 AM To: towertalk@c
6 minutes on how the wind turbine tower is built https://www.youtube.com/embed/84BeVq2Jm88?feature=player_detailpage 73 & DX, Gary - AB9M --Original Message-- From: Gary - AB9M Sent: Sunday, June 21,
I use weed trimmer line.... Its tough, strong, and non-conductive and it lasts. 73 & DX, Gary - AB9M --Original Message-- From: TexasRF-- via TowerTalk Sent: Monday, August 31, 2015 7:12 AM To: co8dm
Note; the stub length includes the Tee and and any switch if used, as well as the velocity factor of the cable used for the stub. 73 & DX, Gary - AB9M --Original Message-- From: Peter Voelpel Sent: T