There aren't a huge number of autotuners that can handle the high power (most are aimed at the 200W and under market).. I like my LDG tuners. Others have had good luck with the SGC line. Things to th
Most of the crank-up towers are advertised with 70 mph ratings, but it is difficult for me to translate that to 85 mph, as I understand that the wind loading goes up exponentially. Back of the envelo
I can hazard a guess as to why. It's mostly marketing.. At that power level, you'll have a fair amount of money into your whole system. Most hams probably don't go out and buy the whole QRO setup all
Because the tuner should really be at the antenna, not at the amplifier. Otherwise, you've got circulating reactive currents flowing through the feedline to the tuner and back, which just goes to hea
They're all cases of catenary curves, and a bit of googling will find a lot of detail Try http://home.earthlink.net/~w6rmk/math/catenary.htm for some equations which might help. getting antennas weig
Yes and no... First off, impedance is complex (it has both a real (resistance) and imaginary (reactance) part). A loaded antenna is using a reactive component to "counteract" the reactive component
Indeed... Title 24 isn't online (except for certain sections), since it's a copyrighted code (one of those nifty peculiarities). You'll have to go to the library. In general, all California laws are
Forgot to mention in last response.. Since you're going to have to have a licensed PE sign the plans, they'll have the code handy, and will have no problem making the statement on the title sheet. I'
At 08:47 AM 4/12/2004 -0700, Dan Bookwalter wrote: Anyone have a good design for an attachment to fit a riding mower to slice the ground, put the wire down and cover it back up ??? yes i am lazy :-)
At 12:05 PM 4/12/2004 -0500, Wendell Wyly - W5FL wrote: Unfortunately, almost ALL 3 point hitches DO NOT apply any downward pressure - only upward pressure. This is true on nearly all tractors. -- On
resistance HF anything what George Hagn (formerly at SRI) did a lot of work on measuring actual ground parameters at RF, using a open two wire transmission line. He actually started using dipoles (f
real This was the approach that George Hagn started with. He was looking at propagation and antenna designs in SouthEast Asia, especially for field expedient antennas (i.e. no multi element beams on
frequencies, the I don't know that it's particularly difficult to get measurements to a few percent. Tedious, perhaps, but not requiring any real special equipment. A standard antenna impedance analy
How would this work for the feed line? I have a Gap vertical I put up over the winter. Now that the ground is thawed I need to do something about the coax feed into the house. It's presently laying o
Periodically on TT (and in other forums) the issue of modeling, accuracy of modeling, and the value of modeling comes up. I thought I'd throw out my thoughts for comment. First, I'd like to start wit
Schedule 40 and "schedule A" or "125 psi" aren't the same thing. Sch 40 is thicker wall. Sch 80 is even thicker. Electrical and water Sch40 PVC conduit are about the same cost. The water pipe is whit
Hello Towertalkians. This forum provides a wealth of knowledge! I have a question about how to handle the coaxes and control wire that come off my 50' Aluma tower crank up tower. I ran these, 2 coaxe
If you're truly interested in reducing the losses and parasitic L, then you could always look into Litz wire. It's available from specialty wire companies like MWS (in Westlake Village, CA) and other