K0UO and V31KW Steve "SKY" Walz Also see V31KW on QRZ.
K0UO's, Kansas QTH is located at a wheat farm/ranch in the "Kansas High Plains", near the center of the U.S.A. about 160 km's (100 mi) WSW of Wichita, KS. This QTH is two miles north of the Oklahoma/Kansas stateline on mile 7 of U.S. Hwy. 281, look for the big tower and FAA airstrip # (4KS), see the QRZ map (no zoning, HOA's or CC&R's here!).
To confirm QSO just use the QRZ logbook.
THE BIG 2014 project underway now: The "KING of Wire Antennas" A W1AW type 550 foot per-leg Rhombic (almost 1000' end to end, it is 4 Waves-Lengths long on each of the four sides for 40 meters!) and planned two other 584 foot V-beams or full Rhombics, all on 90 foot wooden poles with others in the works. I'm working on the Lost Art of Rhombics, building these at the Kansas QTH. (Update: April 2014, the poles are up and in test mode now. The gain over my full size 2 element 40 meter vertical phase beam, which is at 100 feet is truly unbelievable)! The ARRL diamond logo is a Rhombic antenna. UPDATE: See the new photos of the install at the bottom of this QRZ page below.
"The very best part of this hobby is the People that you meet, and the great Friendships that happen as a result". The DX has been great last fall, winter, and spring 2013-2014, so get on the air and have some fun! When all else fails, we hams will be on the air.
Breckenridge, Colorado in the photo below, is my other QTH. It is at an elevation of 10,200 feet (3110 meters) near "Baldy Mountain". I also love making mountain top QSO's from the 14,000 foot Colorado Rocky Mountains. The Jeep 4 by 4 I use is equipped with an IC 7000, checkout 7.225MHz which is the "Off road Hams call channel". Great skinging in Breckenridge this year, with over 440" of snow by April 2014.
Above, my Breckenridge, Colorado QTH
When in Belize my call is V31KW, one station is at the Belize Defense Force base, Ladyville Belize (INTL. Airport). I have a remote rig also setup at this site, and have run AIRMOBLE 160-70cm!! See Dec. 1996 QST Page 20 for photos of Miss Belize and General Walz and more photo's of towers at http://www.rfcomply.com/pc/products_services/miscellaneous/amateur_radio.php
In my pressurized Twin Cessna P-337@ 20,000 Feet passing through a T-storm
At the controls of one of my highest power stations! KPAK 97.5 FM a High Power FM Broadcast Station
Photos Below: I love to off-road in my Overland Jeep, with an IC-7000, 500 HF amp, Kenword TM-D710, APRS, Land Mobil Radio, Airband, and VHF Marine. Colorado and Western U.S.A. offroad trail Fun!
My wife is N0UO, my oldest child is Miranda KB5CST, and my son is KD0DOC.
Things that I like to do, are playing with the grandkids, flying, farming, driving corvettes, ATVs & motorcycles (Harleys & Moto Guzzies), hunting, shooting (full auto class 3 guns), and building antennas. See Mule Creek Hunt for photos of my hunting area near my QTH http://www.rsicorp.com/mule_creek/index.html
I'm 60% retired, but the other 40% of the time that I do work, are doing things that I want to do! As Director of RSI Corp which is a Telcom-Technical and Safety Service Firm, Two-way radio services and the other business ranging from Farming to Oil & Gas services. see http://www.rfcomply.com/pc/index.php, http://www.concretewalz.com/, http://kpak.net/
I started into ham radio in 1967 as WN5UTO, then WA5UTO, in the 1970s I moved through all the classes, and passed all the code tests 5, 13, and 20 WPM, also I held the old call from British Honduras of VP1KW (now in Belize I'm V31KW) and MARS radio AAT6PS. I'm a J-38 straight key guy, hold a 1st Class Radiotelephone license (now the GROL) and I'm authorized to conduct FCC commercial radio exams for the GROL.
Life ARRL, ARRL Volunteer Consulting Engineer for the Midwest Division, 160-6 WAS, DXCC, VUCC,and Royal Order of Wouff Hong, I sometimes contest from the Bunkhouse see "KB0HH" on QRZ.
Radio equipment in use: ICOM 7800, IC-7600, IC 7000s, Kenwood 990 (this is a very good rig, I'm an Icom guy but I think it bets the 7800, DX 5000 & Flex 6700 at this point), Kenwood 2000, Yaesu FT DX 5000 MP, Flex 6700 and an Elecraft K3 (I'm not a big fan of this radio, tx audio is poor and I'm on the second K3 now and it is still not not great, in fact the IC 7600 is an overall better rig). Amps in current use are AL-1500 two-hole with "2 x 8877 tubes", Icom PW-1, and Tokyo HL-2500. Vintage equipment that is on the air, Johnson Ranger & Valiant, Gates 1K, Hammarlund SP-600, and a R-390. When I go SK my wife will have fun getting all of this junk out of here!
Antennas are the most important part of your station: Most places that I have lived do not have tall trees, so an important part of my antenna projects over the years have been able to build and climb towers safety (I have climbed broadcast tower which are nearly 2000 feet tall). I have been teaching many types of telecom safety and technical classes since the 1990's, (over 15,000 students through RSI Corp) .
In 2010 a new 195 foot Rohn model J rigid tube bolt together export type (Rohn 55 size) tower was installed to replace the Big Tower. On 160, & 80, I use full size 1/4 vel's four Sq's hung off the tower and the guy wires, for 40 a full size 2 elvertical phase beam @ 100 ft and on top a 8 ele-long boom log for 10Mhz- 50MHz
The old Tower in the top photo, was10 feet wide, with the work-deck @145 feet. The center tower is180' tower with a prop-pitch motor ground mounted using a M2 RC2800 control box, (FCC tower reg number is for 195'). 1000' to 2000' long rx/antennas the big tower had the these antennas, 60 meters 1/2 wave dipole at 150', 40-10 8 el M2 log beam at 168Ft.
THE BIG 2014 project underway now: The "KING of Wire Antennas" a very large 550 foot per-side Rhombic which is most 1000ft end to end, See photos below, planning two 584 feet V-beams (may be made into full Rhombic's) on 90 foot wood poles.
In the past I had tried EME and JT65 on 2 meters using four M2 5w's Long boom az/el 170Ft, 220 M2 30' boom beam, four on 70cm M2 33' Long Booms 172', 902-1296 six foot dish 140Ft all VHF and UHF antennas are feed with 1 5/8 hard line.
The Kansas QTH can be run "Green" using Nat-Gas from our own oil & gas wells which are on the farm, powering a 20KW back-up generator!
Good DX and 73's
Life's to short for QRP Ameritron AL 1500 Amp, but this one has Two Tubes (8877 x 2)!
This view is looking from the 100' level on the old tower and up to the top, the work deck level was at 145ft. 10 foot wide and set in 27 yards of cement.
The New Tower is 195 ft FCC Tower number #1216715, just east of ther Walz Airport "4KS".
This video is of the 1st no code hams http://www.youtube.com/watch?v=NJGrlUXCZzc (have fun with it)!
The Big Rhombic Antenna Project
The base of one the the feed poles, which are about 30 meters tall. Note the open wire tapered feed system wires coming down the poles to provide a broadband match on HF, One meter wide at the top tapering down to the feedpoint.
Rhombics have a high input impedance of about 600-800 ohms, so it's a non-trivial matter to achieve a match to 50 ohm coax while still retaining the very broadband nature inherent to the terminated rhombic. This led me to do some research on "tapered lines", the result of which is shown in the pictures here. After several prototypes, I settled on the tapered 2-wire transmission line shown here which is a modified exponential taper.
Rigging the antenna cables. Note my tallest ham tower 1/4 of a mile away in the photo!
It took days of layout and tree removing to get through the wooded creek bottom area using my Cat D5
This project so far, has used 1000 foot of hard-line 50 ohm feedline, 1000 foot of control cable, 1000 foot of 600 ohm feedline and I will have used over a Mile and 1/2 of 3/8" cable for the antenna when complete!
How Do They Play?
A detailed modeling analysis of these rhombics has been done, but the on the air tests and OSO's show the real power of this antenna. With more than 2200 feet of wire in the air on the main antenna, the “RF gotta go somewhere”.
I have connect open-wire feed lines to each end of the antennas ends, bringing these to a central point in the middle and switching in a termination resistor or a balun to switch directions. The antennas also work very good in the "Bi-direction" mode.
The Plot is for a 3 wavelength Rhombic per side on 40 meters showing gain at 10MHz K0UO's antennas are larger!
KanOkla Intertie Repeater System is one of our projects, see the Map at http://www.statelineskywarn.com/coverage.html
1134138 Last modified: 2014-07-27 21:07:50, 33753 bytes
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