My usual go-to chemical anchor epoxy for this kind of application is Hilti HY-200. I also like Hiti's HIT-Z anchor rods, but they aren't available in hot-dip galvanized unfortunately; give them a sh
-- Jeff WN3A -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ __________________________________
I was joking, hence the smiley. Just like this one :-) -- Jeff WN3A -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus __________________________
It seems to me what's really being overlooked is the skin effect. Regardless of what method(s) are used to mechanically secure the joints, I have to believe that slit tubing and a hose clamp placed
Which TIA-222 standard are you required to adhere to by your AHJ? A 45GSR (solid-rod) will provide appreciably more capacity (38.3 sq ft, 110 MPH rev G) than a 55G hollow-leg. meter three element (2
Right-O. It has nothing to do with migration of the center conductor, but rather deformation of the shield. If the reels if LDF were laid down gently (as opposed to being flopped on its side as what
Right. Real amphenol UHF elbows (83-1AP) use polystyrene dielectric. It is clear. The dielectric constant is 2.56, which is better than bakelite but not as good as teflon as far as keeping the Z0 cl
Charlie, Email me measurements of the exact OD of the shield and center conductor of the 1/2" ("500" in cable TV speak) cable you have. I have some SO-239 connectors for 75 ohm 500 that you might be
Part of the problem is that some people consider "resonance" and "matched to the transmission line" (i.e. 1:1 VSWR) as being one in the same when they are talking about antennas, when they most deci
That's correct! NoAlox, Penetrox A, and similiar compounds made for aluminum-to-aluminium or aluminum-to-copper joints are often mis-applied. Smearing it on the surface with a finger, via the nozzle
I've used 10 conductor 18AWG sprinkler wire for Ham-IV and T2X, which is readily available (Google says Home Depot even carries it). With 10 conductors, you double up on two sets of wires for the tw
If you're going to go that route, why not just bond the shield of the coax to the lower boom at the rear and at a few intervals going forward to the feedpoint? If I were to attempt to do something l
Assuming the yagi is mounted in the clear and can be rotated, first point it at the FM station and make a measurement, and then rotate it 90 degrees (broadside) and take another measurement. If the
There does not exist a rope that remains a good insulator once it gets wet... In high-power broadcast, we regularly see burn-outs caused by weather-worn fiberglass insulators that start to wick up w
At one time Andrew (now Commscope) used to sell replacement center pins, O-rings, and gaskets for foam Heliax connectors. For most connectors, you could buy the center pins alone, or purchase a "con
Nothing changed in -1L regarding the baseline for structure height marking/lighting, it's still 200' (see section 2.1). Likewise, the baseline in 14 CFR 77.9(a) is still 200'. Of course, some struct
I use FEP-jacketed cables outdoors on new installations (primarily RG-393), and have taken down antennas that were up for 20+ years using the same cables and never saw any degradation whatsoever. Al
It should probably be noted that there are no regulations regarding safety procedures that apply to amateurs doing work on their own towers, or otherwise doing work on a tower for non-work-related pu
Definately avoid Superflex outdoors. I could give many dozens of examples of water ingress on commercial installations where Superflex was used outdoors as the jumper between the vertical Heliax fee
Most purpose-built GPS splitters have diode-steering for the DC from each port to the common (antenna) port, so if you hook up multiple GPS receivers that each source voltage for powering the LNA in