An easy and cheap way to do this is to use back-to-back muffler clamp saddles. Bolt them together with straight bolts. Strong enough for most ham installations and cheap. Only problem is that it is g
Many big antennas are supported by muffler clamps from the boom plate to the mast. The forces associated with rotation are usually much higher than the dead weight of the antennas. My suggestion for
Scott-- Sounds like you are getting lots of good advice. I had a stack of two of the 4L40M KLMs stacked with four TH7s. Two of the TH7s were within 5 ft of their respective KLMs. Never had the triban
Although I was involved in lightning research in the 1970s on tracking the movement of the stepped leader by interferometric positioning of its low-VHF radio emission (published in the Journal of Geo
Nylatron is a very interesting material but there are MANY variations of the product. See this site for about 20 or so different "Nylatrons". It is NOT a variation of UHMW--but rather something compl
Jim-- You raise some interesting points, but the analogy above does not apply because the guys are not in parallel. They are separated by a long section for relatively flexible tower. So the tower d
Pete-- I really don't like high-value, small-wattage resistors for static drain. If you get a nearby lightning strike it is possible to blow the resistor and never know it--then you no longer have st
What, then, prevents you from measuring the transmission line loss, and adjusting transmit power to make up for it? This discussion comes up almost every year on one reflector or another and is a was
I received a lot more off-reflector "thank you" replies than criticisms. But there were also both off-reflector and on-reflector comments questioning my intent. Let me do one last posting to the refl
If memory serves me, WA6ZZK's 20M Yagi on the cover of CQ Magazine was 13 elements with a 156 ft long boom. My dream has been that someday I would build something just a little bit BIGGER! ;-) 73--Jo
OH8OS's array had a total of SIX 6L KLM 20M Yagis--so the right answer is 36 elements. The big amp also helped make it even louder. Somewhere in the chaos of my move to Texas I have some photos of th