Another possibility: It sounds like the stub is tuned for minimum impedance on 40. That may not be necessary. If you tune the stub for maximum impedance on 80, its impedance on 40 may still be low en
I've used monofilament fishing line as insulators on temporary antennas for years, and never had a problem. I suppose UV would weaken it eventually, so you might have to replace it every few years.
You might get an idea of the voltage by modeling a center fed full wave wire, tuned for maximum impedance. It will depend strongly on wire diameter. For a center fed dipole, figure half that impedanc
As I recall, the T2X is concentric with a 2 1/16 inch mast. Use with a 2 inch mast requires a 1/32 inch shim. 73, Scott K9MA I have had a number of T2X rotators over the years and they all worked nic
I use one of these: https://www.elkriver.com/prod-19-1-533-65/eagletower-lx-harness-l.htm I think it is similar to the Sala harness. I use a double fall arrest lanyard to the dorsal ring, with two go
My spare Tailtwister measures exactly 3.00 inches center to center. I thing you template has shrunk. 73, Scott K9MA Will the Ham II rotor's four mounting bolts fit in the same four holes that are dri
I dont know if it is necessary here, but I clean corroded copper wire for soldering with hydrochloric (muriatic) acid. A quick dip leaves it bright and shiny, then I rinse it off with water. 73, Scot
On 7/21/2020 2:49 PM, jimlux wrote: Or 4 nuts - nut1 wire nut2 pvc nut3 wire nut4 The preload between nut1 and nut2 and the preload between nut3 and nut4 are what make the contact. Takes two wrenche
"Thin head wrenches" does yield some results, but none of them seem to specify the actual thickness. That includes the very expensive set from McMaster-Carr. I have many sets of "Ignition Wrenches",
1/8 inch is too thick for 6-32 or 8-32 jam nuts. 73, Scott K9MA Don W7WLL Speaking of which, it's hard to find wrenches thin enough to lock two 6-32 or 8-32 nuts together. I have one old, cheap, Craf
Thickness is unspecified, and the smallest wrench is 3/8". 73, Scott K9MA "Thin head wrenches" does yield some results, but none of them seem to specify the actual thickness. That includes the very e
After recently ruining several drill bits trying to drill through a cast iron fence post, I discovered there are carbide tipped bits for drilling metal. I haven't tried them on anything, let alone cr
It's also good to minimize the number of unbonded metal-to-metal contacts, which can generate harmonics and IMD. As Tim pointed out, the Phillystran big grips are 3 feet long. 73, Scott K9MA --Origin
73 Tim K3L For those of us not living near major population centers, hiring a tower professional is often impractical because of the travel required. While that may not be a big obstacle for a major
Worked for me. 73, Scott K9MA -- Scott Ellington -- via iPad _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contestin
If I remember my statics 101 correctly, in the direction of the wide axis, the two 4 X 4 posts will be stronger. but only if they are glued together. With glue, the 4 X 8 post will be 8 times as stro
Ive been using a 5/8 inch lifeline and a rope grab. It takes one trip with the gorilla hooks to put it up, and another to take it down, but all the other trips are much easier. 73, Scott K9MA -- Scot
I normally use double fall arrest lanyards from the dorsal ring, one of which is always attached to the tower. However, if I'm going to be making multiple trips, I'll install the lifeline. Installing
Hi Gary, I'm sure steel cables and cable grabs are still used, but I found the rope to be much cheaper and, as far as I can tell, perfectly adequate. 73, Scott K9MA On 9/6/2020 11:42 PM, Gary K9GS wr
I thought of that, but couldn't figure out how to secure the top end of the lifeline without climbing up there. Perhaps there's some mechanism which would do that. Otherwise, the halyard has to be as