The electrical concept is very attractive, the mechanical implementation might be an area of concern. Things that move (with precision) up in the wind and weather, etc. are always an area of concern.
There is solder made especially for aluminum, but the real secret is excluding oxygen during the process, a function performed by the "flux" in the alumnimum solder. I have heard, but not tried, that
electrostatic charging by the wind blown raindrops? This is a commonly known phenomenon. (called p-static in the aviation area).. Off hand, I don't know if your setup could hold enough charge to allo
Most damage in tornados is from horizontal wind component. There is very little upward component in the typical tornadic vortex flow. The horizontal wind picks things up and throws them, rolls them,
At 11:34 AM 8/22/2003 -0400, David J. Windisch wrote: So. Should I throw caution to the winds and money to the PE fella, the twp board of zoning appeals (twp treasurer, really), the county building p
Electric screwdriver? Cheap, about 1 rev/sec, etc.. There are more surplus DC gearmotors out there than you can imagine. Check places like All Electronics (http://www.allcorp.com/) and so forth. Here
googling for "bird strike communications tower" turns up many useful hits and a website: http://www.towerkill.com/ They give some statistics... several 1000 foot class towers show tens of thousands o
At 04:37 PM 8/22/2003 -0400, you wrote: Wow....thanks Jim....I think I need to educate myself a lot before attempting answer to this. I never thought that driving stepper motor is so simple. Well I a
For what frequency? (i.e. how good does the surface quality need to be... meters, centimeters, millimeters) For what sort of durability? (one time use in a benign enviornment or howling blizzard and
Expensive in an absolute sense, compared to a case of beer or wine. However, how expensive is it in the context of the total station value? And, do you really need 36 chokes? For that kind of volume
I assume you mean 148 MHz and 2 meter band, not a 2 meter diameter dish? To get any sort of reasonable gain you're looking at a fairly large dish (10 meters in diameter, perhaps?) At least for this f
Clearly you aren't sufficiently "devoted to the cause"! <grin> Would I have Sure.. nothing special about a big panel... it's the low impedance from the arrestors to the lightning ground that's import
The towerkill web site makes the point that tall lighted towers (which are the ones at issue here, by the way) are not the only, or even the major, source of bird kills. They point out (as did a post
It's pretty straightforward to join (bend?) two ropes together with the figure 8 style knot. Tie the 8 in the end of one, loosely. Feed the other robe through to match the first, except coming in fro
The fig 8 is popular among climbers because it is so foolproof. You can see if it's tied wrong, you can feel if it's tied wrong (yep, there you are, in the dark, in the rain, rapping off a climb a bi
I have the older version (without the R and X display.. just frequency and the two analog meters) and I've found it's actually quite rugged (i.e. bouncing around in a milk crate in the back of the ca
I like the coax standards because you can use them to check frequency, too... The length of the coax and it's velocity factor don't change all that much with temperature (unless you're using fancy Go
If you don't need accurate positioning to a fraction of a degree, I would try wrapping some rope around the mast using a stack of turns with some clove hitches, then tie the rope off to the tower leg
I would hope that someone (or more than one) from the ARRL (and just hams at large) will be attending the conference at the end of September. http://www.uplc.utc.org/index.v3page?p=29052 Sunday's aft
At 10:28 AM 9/2/2003 -0400, Cqtestk4xs@aol.com wrote: Check out this site for some interesting video from your local future BPL providers. http://www.uplc.org/ Near the bottom there is a black box on