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My amateur radio career began in September 1969 when I obtained my general class license, callsign WA0ZRT. I was 15. Shortly after receiving my license I encountered the County Hunters Net on 75 meters and found that my county (Fremont) in Iowa was very rare. I worked all 50 states that night on 75 m before I closed my station the next morning at 5 AM. This was in an era when I had to ask permission to make a long distance phone call 40 miles away.

During my highschool days I used a Galaxy GT-550 ( 550 W PEP, 360 W CW ) and a TA-33 mounted on the second story of my family's garage. Propagation to the east, west and south was extraordinary so I had many enjoyable QSOs on 10m and 15m.

For a time after college I was very active. Being the poor college graduate that many of us are in our early years, I built my own free-standing, 63 foot tower and this became home for my TA-33. The tower was 4 feet on-a-side at its base, tapering to 18 inches at the top for the last ten feet. Now some thirty-seven years later, it is still standing in my small hometown in Iowa.

A return to college and accompanying major career shift to electrical engineering kept me away from the hobby considerably until I returned in February 2006 to try out the Virginia QSO party. I had such a good time that I soon acquired an SB200 amplifier that received the customary modifications. With some power to accompany my disadvantaged antenna situation ( due to covenants and restrictions {C&Rs} ), I became further involved

I moved to a new country QTH in Oct 2010 where I am able to install antennas. In early September 2011 I finished the majority of the new antenna installation. The 72 foot crankup tower has a complement of a Force12 C-31XR for 10-20 m and a Cushcraft XM-240 for 40 m. When fully extended the C31XR is at 73 feet and the XM-240 at 81 feet. August 2012 I installed a DX Engineering DXE-8040VA-1 vertical ( ~ 54 ft high for 80m). There are 90 radials forming the ground plane for the vertical. I have gone to considerable lengths to modify my station for SO2R operation.  I am using an Array Solutions 2x8 RatPak and a Microham u2R. I am in the process of changing out various stubs at the antennas with homebrew, 5th order 2KW bandpass filters for added isolation, in addition to Bandpasser II filters at each radio. Those of you who are SO2R buffs may enjoy my description of the home-brew 40m and 20m bandpass filters described in K0ZR Writings at www.k0zr.com.  Another important modification has been to change the open-sleeve feed of the C31XR to three separate coaxes and chase down tweeks to minimize inherent interactions with the XM240. I continue to do battle with "RF flooding" wherein the house wiring rectifies and produces other "hash" at 2X the fundamental, sometimes covering tens of kHz.  This only occurs when the yagis are pointed at the house,of course the direction of Europe. 

I look forward to our next QSO, whether at a leisurely, rag-chew pace, or in a contest. I operate almost exclusively CW.

On the left, below, is my operating position with my Ten-Tec Orion II transceiver and a Centurion amplifier, as well as an Alpha 8410. To the right is a picture of the QTH with the yagis approximately 125 ft beyond the house. The antennas are rotated by a M2 Orion 2800P rotator.



Ten-Tec Orion II,Ten-Tec Centurion amplifier,Alpha 8410 amplifier, Elecraft K3
Ten-Tec 238B Antenna Tuner for each radio


Force12 C31XR for 10-20m; 20m - 3 Ele; 15m - 4 Ele; 10m - 7 Ele
Cushcraft XM-240 for 40m, M2 RC2800PX antenna rotator
DX Engineering 80/40 53 ft Vertical ( 90 radials ) for 80m
Inverted Vee for 80m (short distance)   Inverted - L at 80 ft for 160 m 
DX Engineering 4-Square for 160/80m receive
Array Solutions 2x8 Switch Matrix remote RF switch
Hamation Bandpasser II for each radio


SignalLink USB; AIM4170B antenna analyzer; Rigol 1.5 GHz spectrum analyzer
Palstar PM2000A Wattmeter each radio; 
Vibroplex iambic key;  MicroHam u2R for SO2R

​Below: Prototypes of 20m 1,500 W Bandpass Filter for SO2R

Other pictures and info at www.k0zr.com

20m 1500 W Bandpass Filter




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7997809 Last modified: 2017-03-29 04:10:40, 9136 bytes

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QRZ Logbook Summary for - K0ZR
Latest Contacts for K0ZR at QRZ.com
dedateband mode grid Country op
LZ5XQ 2017-07-15 20M CW KN32rl Bulgaria Steve
R6RA 2017-07-15 20M CW JN63ec Russia Konstantin Kuptsov
F5IN 2017-07-15 20M CW JN18 France MIKE
GM0ELP 2017-07-15 20M CW IO75xr Scotland D. MAXWELL
IK0YVV 2017-07-15 20M CW JN62hn Italy Marco
F6HKA 2017-07-15 20M CW JN05ot France Bertrand
PA3EVY 2017-07-15 20M CW JO11wh Netherlands WILLY.E VAN DE VELDE
G3XTT 2017-07-15 20M CW IO91mm England DON I FIELD
S52NR 2017-07-09 40M CW JN75tv Slovenia Dusan Kostrevc
TM5M 2017-07-09 40M CW JN39bc France
DL8CA 2017-07-09 40M CW JO31gr Germany Andrej Cerkezov
W6EU 2017-07-09 40M CW CM99uh United States JAMES C DUFFY
N0AV 2017-07-09 40M CW EN32ar United States JAMES D HARVEY
N7WA 2017-07-09 40M CW CN87wj United States MICHAEL W DINKELMAN
SN2B 2017-07-09 40M CW JO83va Poland Regionalny Klub Krotkofalowcow Contest Callsign For SP2PIK

Book Totals: 92946 qso's   8048 confirmed Get a free logbook at QRZ.COM

DX World Award#4526
Granted: 2016-10-04 03:58:03   (K0ZR)

  • 15 Meters Mixed
World Continents Award#15426
Granted: 2016-10-04 03:58:03   (K0ZR)

  • 5 Band Mixed
  • 10 Meters Mixed
    15 Meters Mixed
    20 Meters Mixed
    40 Meters Mixed
    80 Meters Mixed
Grid Squared Award#14003
Granted: 2016-10-04 03:58:03   (K0ZR)

  • 5 Band Mixed
  • 10 Meters Mixed
    15 Meters Mixed
    160 Meters Mixed
    20 Meters Mixed
    40 Meters Mixed
    80 Meters Mixed
United States Counties Award#4831
Granted: 2016-10-04 03:58:03   (K0ZR)

  • 250 Counties Mixed
  • 100 Counties Mixed
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