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NX6DX USA flag USA

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Ham Member Lookups: 2257

 

 

I have 4 chidren, and 10 grandchildren, whom I see all too infrequently.

License classes held: Tech, Tech+, 13 wpm General, Advanced, Amateur Extra

Callsigns held: KE6UME 1995-2011, NX6DX 2011-Present

Licensed since 1995, I enjoy antenna building. Many of my antenna projects have been of the VHF FM variety, due to size and budget manageability (and because the local ARC was very active on FM). I have been exploring more HF antennas, both for home and portable use, the past couple of years. A W5GI "Mystery Antenna" (MA), built from instructions found online, replaced a dipole with doglegged ends. I received favorable reports from across the country. I am currently feeding a 250 ft loop. A bit short for 75/80, but loads nicely through a homebrew L-network tuner. For 10-15-20 I'm using a homebrew G3TXQ Broadband Hexagonal tribander beam. A very cool antenna. You can learn more at: http://www.karinya.net/g3txq/hexbeam/and http://www.leoshoemaker.com/hexbeambyk4kio/general.html.

 

NEW==> My current antenna project, as of 6/11/13, is an 8.5-ft diameter magnetic loop antenna for 80-40 mtrs. Pictures of the ongoing build and other projects may be found at:

https://picasaweb.google.com/109268056202017036701

I have had to wade through much information, some sound, some not, to reach a point where I feel confident my design and construction process will produce an efficient, high performance Small Transmitting Loop antenna. An excellent starting point for anyone interested in understanding these seemingly enigmatic antennas is a read of Leigh Turner's, VK5KLT, treatise entitled "The Underestimated Magnetic Loop Antenna." This document provided me an understanding of the various characteristics associated with this unique design, and helped me keep focus on giving this type of antenna every chance to be a success. It may be found in PDF fomat in various places, and may be viewed here.

Would also like to thank Mike, VK4AMZ, for providing the final inspirational push for me to attempt this larger MagLoop project for lower bands. Though we've never met, or communicated directly with each other, the description of his project and on-air results I found on his website, simply convinced me of the viablility of such an antenna project. Mike's informative website is here:http://www.brisdance.com/vk4amz/

 

Have moved from a Kenwood TS-430S and MFJ-949E Deluxe Versa Tuner II, to an Icom IC-736, Heathkit SB-201 amp, and homebrew L-net tuner. There's a few pix of the tuner at the bottom of the page. There is an ongoing project for a more "finished" tuner.

 

The picture at the top of the page was taken from a couple of houses away and shows the BBHex at about 40 feet and a Super-J I built in 1997. For those interested in a great omnidirectional vhf vertical with some gain, the Super-J is an excellent choice and is fun to build. The MA feedpoint is just below the Super-J, but is hard to see in this picture. One side of the loop is now in place of the Mystery Antenna.

Thank you for the lookup and GUD DX.

Catch y'all down the log.

73,

John, NX6DX

 

World Daylight Map

 

Here's a peek at a couple of my projects. I finished the homebrew Tri-band BBHex (G3TXQ Broadband Hexagonal Beam), mounted on a Rohn 40 pushup mast, in June of 2011 . Probably the last time I'll use such a mast except possibly for a simple wire antenna support. It's stable, once erected and guyed, but the raising and lowering can be tense when there is lateral weight on top.

Also a few pix of the homebrew tuner. The coil was wound from 10 ga. ground wire, stripped of insulation and stretch hardened. The stator and rotor plates of the air-variable cap were cut from a section of aluminum raingutter. Painstakingly cut, shaped, filed, sanded and mounted. Interesting project, but hard on the hands when using hand tools. The box is a household coax or phone wiring terminal box. The foil around the box was a last minute addition after checking into a net with RF getting into the mic. A quick trip to the kitchen and I was back on the net in no time. Like some ugly baluns, it looks funky, but it works great, and handles all the power of the SB-201.

 

 

 

Concentric air-core balun placed at the feedpoint.

All elements are now above 40'.

 

 

The old station, when I was relegated to the garage.

 

 

Here are a few pix of the tuner project and current station.

 

 

 

7391148 Last modified: 2016-06-18 02:34:58, 13254 bytes

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QRZ Logbook Summary for - NX6DX
Latest Contacts for NX6DX at QRZ.com
dedateband mode grid Country op
JE1LET 2016-12-28 20m SSB PM95ng Japan MASAHIKO OTOKOZAWA
W6DDU 2014-01-08 160M SSB CM88sg United States GORDON L KIRBY
W6DDU 2014-01-08 80M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-12-11 160M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-12-04 160M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-11-20 80M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-11-05 80M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-09-18 80M SSB CM88sg United States GORDON L KIRBY
K7TUX 2013-09-15 20m PSK31 EM20cd United States John P Thompson, II
N6KEL 2013-09-13 2m FM CM88pk United States Kel J Wagner
W6DDU 2013-08-14 80M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-07-03 80M SSB CM88sg United States GORDON L KIRBY
W6DDU 2013-06-19 80M SSB CM88sg United States GORDON L KIRBY
K7MJB 2013-05-24 40m SSB CN84mw United States Michael J Brechtel
WX7MB 2013-04-21 20m SSB DM43dh United States Mark A Bales

Book Totals: 33 qso's   28 confirmed Get a free logbook at QRZ.COM

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