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(Above: Buckmaster OCF feed point backlit

by the Super Moon of 13 Nov 2016)

                           The Huachuca Mountains in snow, Carr Peak in the center.  


Thanks for visiting my QRZ web page. . . . . 

First licensed in 1973 as WB5KVC,  I was attending the 0505 Radio Systems Course at Ft. Monmouth, NJ and
studying Morse code using my "Learn the Morse Code" LP record (vinyl).  A classmate and I drove to New York
City and appeared at the FCC office before the examiner.  We both earned our Advanced licenses.  A few months
later stationed at Ft. Buckner, Okinawa I purchased a Yaesu FT-401D and was on the air as KA6RS from 1973-1974. 
Then reassigned to Ft. Shafter, HI in 1974, another friend and I sat before the FCC examiner in Honolulu, passed
the theory, copied 20 wpm and  earned our Extra class licenses.  At that time I obtained the call N5GR and operated
from Ft. Shafter until stateside reassignment in 1977.  Then starting about 1980 other things took priority, I sold all
my gear and took a long leave of absence from amateur radio until 2012 before renewing my interest.  In Nov 2012
I took the Technician and General exams at the local club and became KF7ZKR.  The next month I upgraded to Extra
Class then obtained the W7GDK call sign in Jan 2013. 

I am active on the HF bands plus 6 M, SSB, CW, and digital modes.  Working a lot of FT8 recently.  

Primary Station:  

Icom IC-7300, Palstar AT2KD, Ameritron AL-80B, Dell XPS Desktop, N3FJP's ACL, Fldigi (RTTY, PSK31), WSJT-X (FT8), JTAlert. 


Secondary Station:

Kenwood TS-830S, VFO-230, SP-230, Heathkit SB-200


Mobile:  Icom IC-718, LDG IT-100, various Hamsticks

Antennas:  Buckmaster 80-6M OCF, homebrew 40M 2 element wire Yagi, homebrew 40M vertical.

Misc:  HI-Mound BK-100, Lionel J-38, HP Laptop w/N3FJP's ACL and Fldigi. 


Additional equipement includes Kenwood TS-530SP with VFO-240, AT-230 and SP-230; Yaesu FT-401D with
matching speaker and microphone.  Shortwave receivers:  Hammarlund HQ-100C, HQ-110C, HQ-145XC, HQ-170A,
and HQ-180AC; Hallicrafters 5R10, S-38 (on loan from a friend).  
I enjoy building and experimenting with antennas.  Currently my Buckmaster OCF diploe performs day-to-day
multiband duties - it just works.   My latest antenna projects are (1) a 40 meter 1/4 wavelength vertical mounted
40 inches AGL with 4 raised radials, and (2) a 2 element wide spaced full size monoband 40 meter reversable Yagi
made from #14 wire and suspended at 24' above ground.  
In addition to chasing DX and participating in contests I enjoy collecting, restoring, and using boat anchor equipment,
shortwave radios (Hammarlund, Hallicrafters), photography, and genealogy.      


Cochise County, AZ  DM41ul



Now docking at W7GDK - the Ft. Huachuca Aerostat!  Buckmaster OCF dipole feedpoint
shown at the 32' level, with the antenna in an Inverted Vee configuration.
Below:  The 4 element wide spaced 40M wire Yagi at 20 ft AGL.     

Although a bit difficult to see, this shot is standing in front of the Yagi showing the south wire end
supports. The two parasitic elements in the foreground have recently been removed leaving 2 elements on 40M.  C
oaxial choke directly under the feedpoint. The crossbars on top of each mast are 1" PVC perches
for the hawks and owls in the area.

Field Day 2017.  

KG7BGK at the controls of W7GDK making contacts during Field Day.  Station consisted of
IC-7300 running 5 watts output peak SSB, MFJ- 868B watt meter, Kenwood SP-230 external
speaker, all powered by an automobile battery and charged by solar cells.  Harbor Freight jump
start battery was ready for reserve power but was never needed.  Solar cells did a fine job of
keeping the battery charged.  


Renogy 100 watt Eclipse Solar Suitcase charging the automobile battery that powered the
Field Day station.  The solar system worked like a champ right out of the box.  We set the included
controller to use a charging profile for a flooded acid battery, and it just worked.  


Rear view of the Renogy Solar Suitcase with integral Adventurer Charge Controller.  Suitcase
came with all cables, controller, built in stand and carrying case.  This system easily did the job.  




Renogy Solar Suitcase maintained a nice charge on the auto battery for the entire Field Day.  
Cables with Power Pole connectors feed the IC-7300 and the MFJ SWR/watt meter.  



Field Day 2017 Antenna.  Tripod holding the 40M 3 element wire Yagi feed point with a 20M
fan-style dipole added.  Coax choke directly under the feed point.   Beauregard the Field Day
Bull is guarding the antenna - we had no unauthorized intrusions into the antenna field!  



Field Day 2017 Station.  SP-230 speaker, IC-7300, MFJ-868B SWR/watt meter powered by the
12 auto battery.  HP laptop running N3FJP logging software.



Close-up of the Field Day 2017 station.   73, KG7BGK and W7GDK.  




The following are some photos of earlier times. 


KA6RS - Okinawa, Japan  1973 - 1974

I operated as KA6RS on Okinawa, Japan, 1973 - 1974.  My first amateur radio station, a
Yaesu FT-401D with matching speaker and microphone, was purchased on the island
at a local ham radio store.  I later loaned this rig to a friend who had expressed an interest
in ham radio.  Eventually we were both reassigned and lost touch over the years.  36 years
later my friend contacted me, our families met at a local restaurant to catch up, and as we
were leaving he opened his trunk and there was my old rig.  His returning the rig to me
rekindled my interest in ham radio.  A few months later I had passed my General exam and
was back on the air. 


KA6RS.  My homemade 2 element 20M quad at Plaza Housing Area, Okinawa, Japan, 1973-1974. 


Another view of the 2 element 20M quad.  It was mounted just high enough to clear the
roof of our quarters.  It was constructed of water pipe, angle iron, U-clamps, and bamboo
spreaders with an integral "Armstrong" rotor.  Typhoon Gilda brought it down in the
Summer of 1974. 



WB5KVC/KH6 and N5GR/KH6 - Ft. Shafter, Oahu, Hawaii   1974 - 1976

I was first WB5KVC/KH6 while stationed at Ft. Shafter, Hawaii from 1974 - 1976.  I also
had a new rig - a Trio TS-820S with matching external VFO-820, MC-50 microphone, and
Trio HC-2 Ham Clock.  While in Hawaii I studied for the Extra Class License.  Once I got
my code speed up to about 24 wpm I went to the FCC offices in downtown Honolulu
and took the exam.  It took me two tries to pass the code, but I finally upgraded from
Advanced to Extra.  I also applied for and received a new call sign - N5GR.   


Yep, it's a Trio, not a Kenwood.  The rig was purchased in 1974 in the Akihabara district
of Tokyo, Japan on one of my many TDY trips to and through Japan.  Boy was that a
sweet radio.  It developed a problem with the digital readout display, becoming intermittent. 
Of course this happened when the radio was out of warranty.  I contacted Trio in Japan
and then sent the display module back to them - they fixed it for free.  This was before
we knew of the now well documented grounding/circuit board problems with the TS-820S
digital displays.  After the fix it continued to work perfectly until I sold the rig in about 1980. 

While in Hawaii I bought a used Hy-Gain TH-4 Yagi and installed it on a tripod on the
roof of our two story quarters. 

Not long after I installed the TH-4 I got the itch to modify it.  I operated mostly on 20M
so I lengthened the boom, added two 20M directors, and recentered the antenna on the
mast/boom support.   I worked a lot of DX with this "TH-6".  That's Gene on the roof
visiting on the way from Okinawa to a new stateside assignment.

And it all started with an interest in shortwave radio.  

Voice of America, Okuma, Okinawa, November 1974.

In November 1974 I had the opportunity to tour the VOA facility near Okuma, Okinawa.  Just
an amazing facility, fully self contained - not only the transmitting and receiving facilities, but
the power generation, full maintenance shops for all equipment, housing for personnel, even
their own airfield.  I remember entering the transmitter building and feeling like I had just
stepped back into the 1950s.  Everything was immaculate - I think you could eat off of the floor.  



The facility had several transmitters with different output power ratings, but the top dog was the 1 megawatt
transmitter shown above.  It was a Continental Electronics 105B.  


Above is a portion of the control console for the 1 megawatt transmitter.  



Close-up of the control console for the 1 megawatt transmitter.  At the time we were touring the facility the
transmitter was off line for maintenance.  No doubt they placed the transmitter on line at night to take
advantage of skywave propagation to reach their target audience.   


One of the "pre-amps" to develop the 5,000 watts of drive as input to one half of the 1 megawatt transmitter.  



The business end of the transmitter.  Above are four Machlett ML-5682 water cooled triodes that - along with
four additional ML-5682s in an adjacent cabinet - were configured to put out a combined 500,000 watts.  
The eight 5682s were thus one half of the final amplifier - an identical set of cabinets with eight more 5682s
were located near these bays.  The output power from each Doherty 500 KW amplifier was phase combined
into one signal of 1,000,000 watts that was delivered to the feedline and ultimately the phased vertical antenna



The feedline that delivered the 1,000,000 watt signal to the phased verticals.  I did not get too close to the
feedline, but it appeared to be two runs of 1 inch copper tubing, possibly arranged in a twin lead configuration,
each surrounded by a protective array of conductors.  Update: I have recently read archival information that
describes the above as two separate feedlines with only one in use at a time carrying the 1 MW of power to the
antennas.  The second feedline is a spare.  As Larry the Cable Guy would say:  "Git 'er dun!"  




8572593 Last modified: 2018-01-10 19:43:31, 32124 bytes

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QRZ Logbook Summary for - W7GDK
Latest Contacts for W7GDK at QRZ.com
dedateband mode grid Country op
IC8DAK 2015-10-28 10m SSB JN70as Italy Paolo Schiano
PY4XX 2015-10-25 10m SSB GG88hg Brazil CARLOS ALBERTO CIPRIANO
PX2A 2015-10-25 10m SSB GG66se Brazil Alto da Serra DX Contest Station
FR5CB 2015-05-21 20m SSB LG79sc Reunion Jean LEONG KAMPO
HA8DM 2015-05-21 20m SSB KN06bg Hungary Kecskemti Zsolt
J79RZ 2015-05-20 15m SSB Dominica Toshikazu KAWANISHI
FW5JJ 2015-05-19 20m SSB AH16vs Wallis and Futuna Is Jean-Jacques FILIPPI
GS3PYE/P 2015-05-18 20m SSB IO85hr Scotland
ES4RZ 2015-05-17 20m SSB KO39vj Estonia VLADIMIR LISOVOI
KD7PCE 2015-05-02 15m SSB CN83lw United States Stephen M Davis
LX1IQ 2015-04-25 20m SSB JN39AR Luxembourg LUC ENGELMANN
ZL2WL 2015-01-29 10m SSB RF80ki New Zealand Wayne . Lester . Z L 2 W L . WILSON
VU3WIJ 2014-11-21 20m SSB MK81ai India SHAJI. P.B
K1VSJ 2013-11-11 15m SSB FN41hu United States Howard M Bromberg

Book Totals: 18 qso's   12 confirmed Get a free logbook at QRZ.COM

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