I am slowly making progress. The download by coordinates pages are working now, but you can't modify the data request to get GeoTIFF. I write e-mails, never get acknowledgements, but it does appeasr
I don't have the latest ON4UN book, but I have an end-fire array of two K9AY loops pointed NE, phased 180 degrees and spaced 130 feet. I'm just starting to evaluate it in the real world. I chose 180
You might want to take a look at the optimizer capabilities of 4NEC2; it's freeware, and provides a very powerful and useful Windows front-end for NEC-2. MultiNEC also provides some excellent capabil
The noalox equivalent sold here is GB Ox-Gard. But this really isn't the place for this - despite its name, towertalk@contesting.com is the place for all practical antenna and tower questions; this l
73, Pete N4ZR _______________________________________________ Antennaware mailing list Antennaware@contesting.com http://lists.contesting.com/mailman/listinfo/antennaware
In my experience the choke at the loop end of the feedline (before the transformer) is essential - the signal levels coming from the loop are so low that it doesn't take much shield pickup to fill in
Samir, this reflector is intended for questions on antenna *modeling*, not antennas, tuners, etc. A much better site for that is towertalk@contesting.com. For 160 in particular, try topband@contestin
I am modeling a 20M 2-element delta loop array with the apex up, 12-foot spacing and the bottom about 35 feet above ground, fed at a lower corner, using Multi-NEC and NEC2. In driven/reflector config
Guys, this reflector is intended for antenna modelers, not antenna builders. You're much more likely to get good response from the group on towertalk@contesting.com which, despite its name, is for to
Modeling's important, of course, but do you really want extensive silly discussion of rivets versus tubing clamps, or ways of polishing aluminum on this list, or serious discussions like one on the 4
I had decent performance from a Butternut 9-band vertical installed on a metal roof. Because I was skeptical about the connections between sheets, I connected a couple of 100-foot wires to the radial
Andrew, I am very suspicious. Running this model in Multinec (NEC2) and 4NEC2, it appears to be very sensitive to the value of the assumed ground resistance. At 200 ohms, it gives me a peak gain -18.
Thanks for the quick reply, Andy. I am no theoretician, but I recall a discussion of the K9AY loop in which one well-qualified engineer asserted that it could/should be viewed as a close-spaced array
Maybe taking it farther afield, but I have done modeling experiments (plus one winter's Europe-only experiments) using two K9AY loops end-fire, spaced 135 feet, with 180-degree phasing obtained by si
The key word is "advertised." The height above ground is the principal determinant of take-off angle, for any horizontal antenna from a dipole on up. On the other hand, if your house were at the top
Does anyone have models of the TH-7 they would be willing to share? A decade or so ago, I had EZNEC models of the TH-7 for 20, 15 and 10M - simplified, no traps - which yielded credible results. They
Thanks to Bob, K8IA, I now have Eznec and NEC models of the TH7. In the files, they are attributed to N6BV and (or via) W2UP. Thanks to you too, guys. -- 73, Pete N4ZR New Articles Daily - the Contes
Try GPS Visualizer <http://www.gpsvisualizer.com/> 73, Pete N4ZR Visit the Contesting Compendium at http://wiki.contesting.com The World Contest Station Database, updated daily at www.conteststations
-- 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at teln
Welll... Just a couple of comments. A stack of 2-element beams can be effective if you get the spacing right. I have a stack of C-3s, and did a lot of modeling with EZNEC back in the day. Wound up wi