John Looking at your layout on Google Earth. It looks like you have space to run radials at least 100' to the north, north east and northwest and southwest I would start there Then I would make frien
Ed questions, questions, question !! 8^) Why does the antenna need to be 6' above the AC unit? Can it sit closer (6")? or even on the roof next to the A/C unit? How tall is the A/C unit? You can of c
Stan So many variables going to be hard to predict. Soil conductivity and drainage will be a much bigger variable than the models can always predict. Put it up, measure the impedance at the feed poin
In the process of trying to correlate actual measured R+jX values vs NEC models for an 80M inverted L with elevated radials, I was directed to a paper by Rudy N6LF in QEX from 2009. I have used Rudy'
Jim Thanks , I wonder why google wouldn't return that. It looks like it might be there. Unfortunately you have to"apply" for an account, And it asks ( unnecessarily IMO ) for a lot of personal info.
Rick I have over 20' depth of pure sand, drains like a sieve literally. It can rain here for days and I have no standing water. Since I grew up in this neighbor hood I vaguely recall the well driller
Jim That is basically N6LF's and my approach so far as well. As I said I was hoping for a more direct measurement approach that didn't involve an actual antenna. I basically live on a large (prehisto
Bruce I now have the paper which unfortunately at first glance appears to be missing the math that converts the "readings" from the OWL probe to conductance and dielectric constant that NEC wants pl
Thanks to all who replied The Hagan paper sited in the ARRL Antenna handbook was eventually located and turned into a scavenger hunt. Hagan published several papers on the subject and the math for u
Two other sources of cable 1) Marine and Boat Trailer dealers 2) 4W drive specialty shops who outfit jeeps and trucks for "off road" duty Dave NR1DX Wayne W3EA Sent from my iPad On Feb 23, 2021, at 1
Has anyone purchased and is using the NEC 5.0 yet? I'm interested to hear what you think of the GUI and model assembly and building process. Talking to the folks at LLL apparently a 5.0 license (at $
Dave will 75 ohm work for you rather than 72? Dave NR1DX Each dipole of my 80 meter four square dipole array is fed with 72 ohm coax. Yes, they are full length dipoles suspended vertially around a 15
Dave I am in the process of rebuilding my array of Coax Reversible BOGs and I just bought a large quantity of RG-59U from Davis RF . http://www.davisrf.com/rgcoax.php The measured velelocity factor w
Chuck The person I spoke to at LLL said the $110 includes an Individual ( non commercial use) license , a copy of the "Windows Executable" and the manual to go with it You can still get 4.2 if you w
Also I do know there are differences between NEC 2, NEC4.1 and NEC 4.2 on how each of them handles conductors on or near earth. NEC 2 does not deal accurately (?) with wire close ( some small fractio
Dan THANK YOU SO MUCH! Never occurred to me to look on QRZ.com . Most of the discussion there answered my questions. I will be in touch Dave NR1Dx PS: I have really enjoyed using Auto.EZ with Ezenc 6
And all the arm waving aside the important graph in N6LF's paper is the one on page 12 which to to the original posters conundrum about what to do with his small yard one can conclude the following:
Mike Based on the models I have seen I think your observations are very realistic. With inverted L's there will be a slight degradation ( 1.5 to 3db) in the direction the top of the L "points" so to
Probably one of few things that is keeping S-IR alive ... I know they have REDUCED their product offering to hams in last month or two Dave NR1DX Howdy, TowerTalkians - This is a little off topic so
When I looked last Friday you could no longer buy the standard 20-6M products ( 3E, 2E etc) . You now had no choice but to but buy an antenna With the 30/40M sweeps which have been problematic. Go he