Van, SteppIR (Fluidmotion) yagis are set for a 22 Ohm feed impedance and use a special balun/matching transformer to match 50 Ohms. One would need at least a two element, close spaced yagi to reach t
"In event you need more silicone wrap, Home Depot carries Model HTP-1010 Garden Bender Silicone Rubber Fusion Tape in their electrical department, UPC code 032076560102. Radio Shack and Wal-Mart are
Nonsense ... I've seen commercial fiberglass antennas last for 10+ years. If I needed to do so I could renew A SteppIR (even a four element antenna) for less than $250 (eight ESTs at $30 each). $25
There is no indication that the SteppIR will require maintenance in five years ... or even 10 years. I would argue that any other antenna will require work of some kind (e.g., cleaning spiders out o
The MonstIR is an amateur version of a receive only antenna that is sold to agency buyers (the commercial version includes coverage to 3 MHz with switched coils). Based on the specs and pictures, th
http://www.mosley-electronics.com/faq.htm Quite simply Mosley's "engineers" are dead wrong. You need only refer to the ARRL Antenna Book, the NBS work on Yagi antennas, or any of dozens (if not hund
Broadcast trucks do not use a Heliax type cable ... I designed and built those trucks for several years. The RF cable is generally LMR-400 or equivalent. We experimented with both Belden 9913 (solid
SteppIR have already done that. The MonstIR was advertised in the May 2004 QST. The cost is high but without careful shopping I do not think that one could purchase equivalent performance (a stack o
Actually, I think one could probably use the very same technology as SteppIR are currently using but fix the end of the BeCu strip to the tip of the fiberglass tube. If the tubes were not "locked" i
YO also works just fine in WindowsXP by simply clicking on YO.EXE. It will open full screen, YO can be suspended and minimized to do something else on the computer (or look up data) and YOU can be r
Based on that article I have even more doubt about this so called breakthrough ... considering the inventor doesn't seem to know the difference between FM/TV towers and AM antenna sites. Rarely, if
Hi Joe, I have some info that might be of interest to towertalk list members. I don't subscribe and right now I don't want to join and get more mail. So would you be kind enough to post this info? I
Unfortunately, all that winding around the mast is not rotation loop (it's the way the mast extension is handeld). The lines (actually the "nycoil" conduit) are still attached firmly at the top/bott
Yes, it would be ... I have considered trying to get 25' (about three turns) of the 1.25" Nycoil material and running two or three pieces of LM400 or equivalent through it as a rotor loop. The botto
Gregg, It "works" as a way of getting the Hy-Tower on 160 meters. 1) the resulting antenna is an inverted L of about 24' height. 2) The feed impedance is quite low (SWR will be relatively high unless
In fact, the SteppIR does not need a complicated and lossy matching network. A matching network, other than a combined un-un/balun is not needed since the proper tuning naturally matches the antenna
If I do, I can get any part I need from an industrial supply store if Fluidmotion (SteppIR) doesn't overnight it to me ... and replace it with a screwdriver. I hope you don't need one of the odd siz
I would not dismiss NT1Y's stack of three 4 element SteppIR's as "not a serious contest station." 73, ... Joe, K4IK _______________________________________________ See: http://www.mscomputer.com for
Believe me, I have drilled out rivets, separated seized element tubes, and waited weeks for an antenna manufacturer to do a "run" of a specially swaged element section or a bracket used only in one
Mechanical problems with breakage (and apparently stretching) of the alumoweld wire in ice/wind. Similar self-detuning of the unsupported "helical hairpin" apparently due to vibration and/or thermal