they are worm gear. there are 2 wires for motor drive, 3 for indicator, and in the larger ones (2700/2800) the 6th line is a switch that detects getting close to the limits and signals the control bo
indicator, detects the based thanks to pete for pointing this out, there is no electrical brake in the Yaesu rotors, but there is some kind of a mechanical spring and cam arrangement on the motor en
If I remember right from a few years ago when I put up some 55g the brackets are not exceptionally tight. I would not expect them to be able to just grab the leg and hold the guy forces, that would t
I seem to remember a discussion long ago about this. I think it has something to do with how slippery the outer jacket is. Since it is very flexible and can slip easily in the eye they wanted the ext
Optimum for what? And from where? For my use I would consider a stack of 6's to be too narrow for contesting from the northeast. Up here a stack of 4's is probably better to cover more of Europe at o
50-60 degrees would be about right. I'm kind of surprised the pv design shows that beamwidth though I would expect it to be narrower. The top antennas on my 15m and 20m stacks are reoptimized telrex
its most likely the klez virus that you are noticing. unfortunately without a detailed examination of the raw headers of the message you can't really tell where it is coming from. the klez virus sea
I REPEAT!! BOTH KLEZ AND THE NEW BUG&*(^% VIRUS FAKE THE "FROM" ADDRESS TO BE A RANDOM ADDRESS FOUND ON THE INFECTED MACHINE! ANYONE'S ADDRESS CAN SHOW UP THERE AND IT MOST LIKELY IS NOT THE PERSON W
beheath there are some well documented 'weird things' about animals and high voltage transmission. Cows are especially sensitive to small voltages caused by the electric field under the lines and al
definately, maybe, yes, possibly, it depends... more antennas are usually better. having different antennas for both transmit and receive is nice when possible. David Robbins K1TTT e-mail: mailto:k1t
with rohn 25 my prefered method is to come off the tower at the bottom set of guys, take them off then lift the tower off the base and use the guys to lay it over like a field day tower. its harder t
w/ used (the After I did that one I used the big heat shrink that has the melting sealant in it. I hadn't cut off all the heat shrink that was on the coil so I only put a short piece on each end ove
An opportunity for someone. Don't contact me, this is just copied from rec.radio.amateur.antenna. <quote> I have a non ham friend who recently bought a house in McLean, Va. that has a 60' self suppor
Sri, nothing here of any practical use. This is just a way for students to observe the phenomenon of phase velocity exceeding the speed of light. No way to transfer energy or information any faster t
Interesting. But you should really compare them over a longer period, especially during good spring or fall propagation. In many years of experience here a full size 4-square with only 4 radials rais
First learn to do a real thin smooth tinning job and trim the end of it fairly smooth so it doesn't hang up on the threads or lip inside the pl259. then a SMALL dab of silicone grease on the cut end
ARGH! How many times do we have to go through this. When you have a 2:1 advantage the ground crew only pulls down on the pole with 1/2 the weight of the load so the load on the gin pole is reduced by
too me And I would be out of a job! Most of my job is writing software that simulates lighting strokes to high voltage power lines. We are still doing basic research on things as basic as what happe
Maybe not all tower/antenna stuff, but there are a few things anyway. Spring cleaning a bit late, got to get rid of excess stuff! This is going fast, one piece sold before I even got this message wri
Is there something that leaches off older towers that kills grass? I don't remember it happening the first 10 years or so, but now on my older towers I have been noticing that the grass is being kill