Sadly, Froggy, the MFJ coil adapter sucks. But, you might have better luck than I did with my MFJ-259 and my A3 traps. Fortunately, I had a B&W grid dip meter that worked outstandingly compared to th
If I have a pair of radials resonant to 21MHz and their ends are to the north and south, will there by any directional effects on that band? n/s, e/w ??? I've never seriously played with verticals t
For a real workout, put a T-fitting on the pipe end and plant it about halfway down in a paint can filled with concrete. That worked real well for me...until I found out about the 1-gallon of water
was lifted to the top of the tower. Do you think that would be feasible with a MonstIR? I don't have enough open space anywhere to build the whole thing on the ground, let alone pull it up through th
I looked in the archives, but did not see..... Given that a properly EHS guyed 70' Rohn 25g tower has it's guys adjusted to 400lbs tension, what is the effect on the tower when one leg set of guys is
Move the tower, Andy. 73, dale, kg5u _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Tol
There's the biggest part of the problem, Bob. You "slapped" it together. Everyone knows that antenna building must be done with reverence and deliberation. All the responses have addressed the effec
Your first step should have been to call them on the phone and find the info you needed. Check http://www.hal-pc.org/~kg5u/a3refurb.txt There you may find what you are looking for or close to it. 73
Why, Bill? I've had an A3 up for 10 years and never did that. It was up for about six years before that before I refurbished the traps and replaced and element segment (damaged from a lightning hit)
I thought the purpose of a thrust bearing was to stabilize the mast horizontally and not to take the weight of the mast/antenna array off the rotator. The set screws are adjusted to remove 'wobble'
Also, isn't whatever beam(s) you have on the tower top a significant factor, acting as a tophat? I noticed when I changed out a TH6 (damaged) for an A3 and later for an F12 C3E the my 80m 1/4-wave h
Eugene, Why not just take the messenger rope through the center insulator and secure one leg to a tree or fixed point and the other thru whatever pulley/counterweight system you have. It may require
I have: 1 Fall Arrest harness and belt - $90 1 4' lanyard - $39 1 6' lanyard - $40 The knowledge and comfort that I am connected to the tower at all times - priceless 73 Dale, kg5u __________________
I put a pulley on the tram line and run the line to the top of the mast. Backguying the mast, of course. I run a halyard line to a pulley at the top of the mast and down to the ground. I make up a r
What Paul said.... When we redesigned the JSCARC (W5RRR) club station, we made an equipment antenna patch panel with jumper cables with push-on connectors on both ends. The primary reason was to mak
Before I found the one-gallon-of-water-method, I took an empty one-gallon paint can, a two-and-a-half foot length of water pipe, a water pipe tee and some concrete. I attached the tee to the pipe, s
What kind of losses do you expect to sustain with a couple of connectors, Gordon? I think you may have more to worry about with the feedline loss than with the insertion loss from a couple of connect
I played around on the other day doing some mainteance. I made up a little jig out of string to suspend between the three legs of my Rohn 25G. I looped and loosely tied one string to one leg. I tied