unplugging the control cable should cause it to go to the counter clockwise stop on the indicator. if it doesn't it probably means the indicator drive motor is bad. this is a common problem with the
I need a new gin pole lifting rope for heavy duty use. I can't find the stuff I have used in the past locally any more. I'm looking to find out what others are using for heavy lifting these days, and
that is common on larger rohn towers, but they don't seem to use that option on the standard designs for rohn 25. -- David Robbins K1TTT (ex KY1H) k1ttt@berkshire.net or robbins@berkshire.net http://
i wouldn't trust it higher than about 10'... maybe 20' if you use lots of bracing and guying. both toprail and conduit are fairly soft steel and easily bent (in the case of conduit thats by design).
lets see.. 1.3db/100' * 156' = 2db at an input swr of 8 gives an additional 2.7db of loss for a total of 4.7db. all this from one lookup in the 1977 printing of the arrl antenna book figure 3-23. but
this has been brought up before, did anyone have documentation showing that this happens? pictures, magazine or newspaper reports, references to failure reports, etc?? -- David Robbins K1TTT (ex KY1H
the r1 and r2 terminals are probably the rotor where the power is applied. the s1,s2,s3 are most likely the stator windings which are the input/output. connect like named terminals together on both m
you aren't the only lucky one, i have 4 of them here. a g-1000sdx, a g-2700sdx, and 2 g-2800sdx's. the rotors themselves have performed flawlessly, even with heavy ice and winds. the 2700 is turning
there is no exact answer. fulgerites(sp?) (glass tubes caused by melting of the soil where lightning strikes) have been tracked for quite a distance in the ground, at least one i remember was tracked
for 4-squares i run a wire between the bases of the elements to make a square, then run radials out from that so they don't overlap. then you can run from the square into the middle so they don't ove
there is a propagation reflector that gets very little traffic besides daily prediction data at: subscribe prop k1ttt@berkshire.net there is also an antenna reflector for those interested in more ant
the answer is... it depends on your definition of 'height'. now, i don't mean to sound like a clinton answer, but here is the problem and what i have seen after lots of modeling. if the top of the lo
most modern tranceivers do have enough protection on the rx line to bleed off that charge, either in the form of diodes or just from the input filters. this charge can build up to quite high levels,
i have plans and software for a rotor controller that i made for the yaesu g-xxxxsdx rotor controllers. its based on a commercial controller that has built in a/d converters and only neede a couple t
definately not normal, the speed control should work both directions. if it was a 2700 or 2800 i would say it was one of the 'close to the end' slowdown limit switches, but the 1000sdx doesn't have t
i have never seen a dead bird under my towers. several on my deck that must have run into the big windows, but none under the towers. in fact the birds seem to rather like to sit on them, i have some
up here the power company is starting to put these bright yellow plastic covers on the bottom of their guy wires. this makes them very visable even in low light. you might check a local electrical su
well, maybe divine prvidence and a bit of statistics. consider a 30m high tower. use a 45 degree angle down from the top of the tower (a 45 degree angle is a commonly used estimate for how big of an
a low impedance path to ground doesn't prevent strikes. in fact the low impedance path will allow more charge from the ground to flow onto the tower and probably increase the chance that the tower wo
where i work we routinely pump 35ka through a #10 wire, for a few microseconds. in that time there isn't enough time for the wire to heat up enough to be damaged. also note that the lightning shield