Maybe it's acting as some sort of weird shunt feed to the tower? It's amazing what you can load up with a tuner and also what can (just be chance) end up being "resonant." 73 - JC, K0HPS <snip>Joe, y
Hi Julio, I have a UST MA-550MDP tower with leveling bolts. My plans, done by Adam Ennis, the PE UST was using at the time, call for grouting but I put a good crown on the top of the concrete base so
I'm pretty sure my old ARRL Antenna Book (1988, 15th Edition) has that setup (top-fed, grounded tower) in the section on shunt-fed towers. 73 - JC, K0HPS <snip>Remember the guy wire your antenna was
http://www.m2inc.com/ I am looking for a good 2m yagi any sugestions? Thanks Joe KI4ILB _______________________________________________ _______________________________________________ TowerTalk maili
Alan, I agree with you completely about the leveling nuts, but a friend of mine put up a used MA-770 and after he had it installed he realized had forgot the bottom nuts. He didn't bother to take it
There are two good tools for evaluating masts and both are connected to this list. One is the MARC software from Steve (K7LXC who provides this reflector) and the other is a spreadsheet that someone
I just use an appropriately sized socket. It doesn't have to grip the ground rod, just keep the hammer from sliding off. 73 - JC, K0HPS I have a large Makita hammer drill and a ground rod attachment
Hi Rick, I'm in the same boat as you and have been considering alternatives. Since only three of the wires need to be substantial size you might install a breakout box on the tower and split the cabl
Actually, while I completely agree with those who feel Tesla was short changed by history, it's the other way around. Edison's electric grid was DC; it was Tesla who championed AC. 73 - JC, K0HPS The
Another interesting (and macabre) twist to Edison's marketing was that he hired schoolboy-thugs to kidnap small animals (dogs mostly) and then electrocuted them in public with AC, except he didn't sa
You just have to shop around. Prices are changing all the time. Be sure to check with Array Solutions, The Wireman and Texas Towers (as well as the afore mentioned RF Connection and Davis RF). I love
I'm a little behind you, Mike. I have a hole in the ground with the tower base in it and I'm building the rebar cage now. I have almost all the materials except the concrete and I still have to purch
"Expert" opinion: do the math. Link to aluminum masts: http://www.texastowers.com/aluminum.htm 73 - JC, K0HPS Sometime recently, someone provided a source for aluminum masts. I would like to get that
Sorry, that was a bit blunt. What I meant was you need to calculate your load and see what kind of mast will handle it. Obviously, "regular" aluminum (like 6061-T6) won't handle the load steel will,
Did anyone else miss two days of posts from the reflector? I finally started getting them again about two hours ago (4:47PM on 8/22), the one before that was 4:14PM on 8/20. All my other e-mail conti
Forget EMT, forget stainless steel (unless you really need stainless for some reason). Aluminum would be ok, but do the math. Check your wind load and be sure the aluminum will handle it. Most long,
There's a good selection of them here: http://www.northerntool.com/webapp/wcs/stores/servlet/CatDsp?No=84&storeId=6 970&N=101 Be sure to look through all the Material Handling pages. There are quite
That link didn't work very well. Try this one: http://www.northerntool.com/ and use the search tool (search for "cable puller"). 73 - JC, K0HPS There's a good selection of them here: http://www.north
When I Googled "bolt torque specs" I found this website. Click on the Tech Data link. There are also pages on crystal radios, ham radio links and more. Check it out: http://www.thelenchannel.com/inde
Kinda depends on what you're building. If it's a simple cage that isn't interlaced with the tower base, just get a local rebar company to build it for you. If it has to be installed in layers or inte