Where possible, use copper strap. It offers lower inductance than wire and due to skin effect is much more likley to Handle the current associated with strikes. Copper has gone up like the shuttle o
Not that I am aware of. The strap is .011 thick or so..probably burn through. Polyphaser reccommends clamps. 73 John _______________________________________________ _________________________________
You might check out what is used when they strip airplanes for re-painting. It doesn't remove the zinc-chromate primer, but removes the paint fairly well. 73, John W8JJW ____________________________
You got it Alan, PolyPhaser states in their instructions for the clamp: "If using other than PolyPhaser ground rods, copper strap may be cut and used to shim the strap-to-rod clearance" All connecti
I have a vertical on a large flat metal roof. Around the edge of the building is a lightning rod system using pointed air terminals and dedicated ground wires down the side of the building to ground
Speaking of the 2800 SDX ..does anyone have a manual/schematic for one and a source for the circular connector on the rotator? Thanks, John W8JJW _______________________________________________ _____
That is the manual for a 2800DXA..I'm looking for the one for a 2800SDX..Older model. Thanks John W8JJW _______________________________________________ _______________________________________________
Similar product is Xtreme tape. Should be covered by a layer of regular electricians tape. DX Engineering PN # DXE-891010 $5.95 73 John W8JJW _______________________________________________ _________
A picture of the mother-in-law up there might work the best. :>)) John, W8JJW _______________________________________________ _______________________________________________ TowerTalk mailing list To
I looked..My Belden catalog isn't old enough. For what it's worth.. Typical 300 Ohm Ladder consisting of 18 gauge, Copper coated steel wire conductors consisting of 19 strands of 29 gauge wires has
The BN-86 I had on my old 204BA was a ferrite rod with turns of enameled wire around it. It was a low power version of the BN-4000. The latest BN-4000B data sheet claims it uses coax with type 77 fer
A Ferroresonant type of line isolator will in-fact take a rather poor sine wave and make it proper. Topaz, Sola, Delta Emerson used to make them. They are not very efficient and don't like loads as t
Try Hill Radio http://hillradio.net/ They have a lot Rohn specs, technical drawings, etc John W8JJW _______________________________________________ _______________________________________________ Tow
I can set certain addresses as "nospam" on SBC in the "my account" area. Got be way to do it on Comcast. Good luck John W8JJW _______________________________________________ _________________________
Mouser carries a number of Jones connectors. Go to their web-site and search for Jones Plugs. 73 John _______________________________________________ _______________________________________________ T
Just doing continuity checks may not be enough, they really should be Hi-Pot tested as well. That's the easiest way to know if they will handle the power.... Most folks don't have a such a tester. A
Penetrox A, made by Burndy, is also good for both. 73 John W8JJW _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@conte
Most of the sealants contain acetic acid, that smells like vinegar while curing, and is corrosive to aluminum. The exception is black RTV made by Permatex, among others. This has nothing do to with h
The 204BA gets my vote also. 20+ years of service with no mechanical problems except the balun (BN86) ..use a good one.. 73, John W8JJW _______________________________________________ _______________
The Receive Four Square using active antennas is also worth looking at. www.dxengineering.com 73, John W8JJW _______________________________________________ __________________________________________