a minor technicality ( I think) the rules are not if they create interference but rather if the field strength at some freq bands and distances exceed the stated limit ??????????? If my memory is cor
I wonder if the "third party mechanical analysis to determine ACTUAL wind ratings" might be flawed? The "Triex" LM470 was actually built by several different manufacturers. When the change was made f
Yes, it has happened to me and I have posted it to this site at least twice. It happened to me but I was able to grab the winch handle (k1550) and stop the "freewheel". This is how it happened to me:
The first LM470 tilt fixture that came with the tower was purchased during the short time that First Call was handling the selling for Paragon (If I remember correctly) and it had a k-1550. It was ve
I found out that it was impractical to move the tilt fixture from my first LM470 to the second LM470 when I wanted to tilt the tower so I ordered a second tilt fixture. By that time Tashjian had star
As I remember, when I replaced the k1550 with the k2550, I had to file two of the mounting plate holes a bit (maybe 1/4" on one side). Other than that everything fit. k7puc __________________________
This is a question i.e. not bad mouthing log periodics! It seems to me that a Steppir kind of antenna rejects out-of-band interference while log periodics enhance out-of-band interference. During con
I think that I wrote the same thing? I would clarify your statement to say that LPDAs do not reject non ham band signals while a band specific antenna will supress them. The bandwidth of an antenna s
What errors may be caused by: The signal generator being too close (or too far away) --how far away is ok? The signal generator being too low in height? Although antenna modeling programs will displa
I would like a simplified remote control i.e. one that would allow me to move out from under the beam(s) as the tower height is changed. I am a bit uneasy holding on to the switch at the tower base w
Yes, yes, it all DEPENDS on what you mean by specific, OF COURSE! If your "specific" question is will my tower fall over in the next windstorm, then "it depends" is the best short answer. As an engi
Whats with this "rule of thumb?" rohn catalog specifying tension should be 10% of the breaking strength? The electrical anaylsis is that a filter capacitor for a 12 volt circuit should have a voltage
I paid $2000 in Olympia, WA for a used HDX572 complete with standoff arms and a standing cage at top. I later sold it for $2000 after never erecting it! -- Original Message -- From: "Neil & Heather"
I had a 50 foot v beam up at about 70 feet for several years but finally took it down because my triband yagi perforned better (except 40m). Its apex angle was fixed at about 50 degrees. That apex an
I wasn't aware that the Green Heron controller could be used to turn the OR2800 rotator! k7puc _______________________________________________ _______________________________________________ TowerTal
I can't recall, in the dozen or so books on antennas etc. that I have, an explanation of the reflection mechanism. Maybe it is in there in the math but not in more simple terms. I vaguely remember,
Last evening a couple guys ran a test of signal strength of the two antennas with several stations separated from 10 to 200 miles apart. The dipole was about 2 s units stronger at all locations. I su
I have been using EZNEC for some time but I am not aware that EZNEC actually indicates if the radiation is horizontal or vertical. I probably haven't read the manual enough. Please steer me on to it?
The referenced link contains a nice drawing showing the difference in sizes for the of the various heights of the LM series towers. I notice that the drawing is dated 1972! Ten years ago Paragon Mfg.
corn flakes, wheaties, pie crusts, snowy or intermittent Not a humorous question: Can an electrical connection really have an impedance or is it a resistance? Ignore the associated wiring of the conc