The Web Page of KP4MD

Air Force Military Affiliate Radio System

Welcome to the Web Page of
KP4MD

Op: Carol Milazzo
QTH: Sacramento, CA
QRA (Grid) Locator: CM98iq
Latitude 38.68° N
Longitude 121.33° W

ex-WB2OZA (1970-1976) ex-KP4EGZ (1974-1977) ex-KP4EMN (1976-1977)

Life Member American Radio Relay League
Member Medical Amateur Radio Council
Life Member Ak-Sar-Ben Amateur Radio Club
Member 10-X International Net No. 7616
Member Military Affiliate Radio System
Member Young Ladies' Radio League

Information on Amateur Radio in Puerto Rico
(History of the Radio Club de Puerto Rico, P.R. Amateur Radio League,
Frequencies, E-mail Lists and Other Links)

Leo Meyerson, WØGFQ, Radio Pioneer Page

The Leo Meyerson Radio Collection Page

WB2OZA in New York
KP4MD in Puerto Rico
KP4MD in Nebraska
KP4MD in California
Original Bibliography
KP4MD Station Equipment

WB2OZA in New York in 1970-1976

After several years as a shortwave listener in the Throgg's Neck section of the Bronx, New York, I obtained a Technician class license with the callsign WB2OZA in May 1970 while a student at Regis High School. At that time, the station consisted of a Knight-Kit TR-108 on 2 meter AM, a Heath Sixer and Lafayette HA-460 on 6 meter AM and NBFM with Yagi antennas. After upgrading to Advanced in 1971, we added a Globe Chief CW transmitter with a homebrew plate modulator and an Allied A-2515 receiver on HF. The HF antennas were a 75 foot flat-top and a Hy-Gain 14AVQ vertical. In 1973 I upgraded to Extra Class and built a Heathkit HW-101 transceiver for HF SSB and CW. I homebrewed a varactor tripler for 432 MHz AM, modified a Motorola T44 taxi radio for 439 MHz fast scan amateur television, and operated through the then new WA2SUR and WA2KEC 2 meter FM repeaters with various homebrew and modified surplus equipment. I operated voice and radioteletype on the 6 meter US Air Force MARS net with the call AFC2OZA. During my college years at Fordham University, I taught a Novice license class at the university club station K2FO and was a member of the Communications Club of New Rochelle and the Tu-Boro Radio Club of Whitestone, Queens.

KP4MD in Puerto Rico in 1976-1987

From 1974-1976 I operated a secondary station during summer vacations in Puerto Rico with the call KP4EGZ. In 1976, I moved to Carolina, Puerto Rico to attend the University of Puerto Rico School of Medicine and operated with the call KP4EMN, changed in 1977 to KP4MD. My neighbors were Agustín Santana KP4CKY and his son, Papo KP4EQG, later WP4Q, whose memory I dearly honor on this web page in Memoriam of WP4Q. I was a member of the Radio Club of Puerto Rico. The HF rig was the Heath HW-101 with inverted vee antennas. I used a Unimetrics Ultracom 25 with a homebrew groundplane on 2 meter FM. I made my first OSCAR satellite contact with Massachussetts by keying the push to talk line on that rig to get CW on the 2 meter uplink. I moved to Río Piedras, Puerto Rico in 1977, and then to Bayamón, Puerto Rico in 1980 to do a three year residency training program in pediatrics. As Air Force MARS station AFP4MD, then as AFAØAF, I ran a weekly phone patch schedule for servicemen at Howard Air Force Base in the Panama Canal Zone. In 1979, DX contacts and sunspots were plentiful with plenty of QSL cards on the wall! In 1983 I joined the U.S. Navy and moved to U.S. Naval Station Roosevelt Roads in Ceiba, Puerto Rico where I worked as a staff pediatrician at the base hospital. Then I transferred to Navy MARS as NNNØRSD and also operated a local VHF simplex phone patch. KP4MD in California

KP4MD in Nebraska in 1987-1999

In 1987 I left the Navy and moved to Omaha, Nebraska where I joined the faculty of the Creighton University School of Medicine and a general pediatric practice. My station in 1989 was the Heath HW-101, a Kenwood TS-140S HF transceiver, a Heath SB-1000 linear amplifier (equivalent to Ameritron AL-80), a Heath SB-610 monitor scope and a Heath SA-2060A tuner.

There was an AEA-PK232MBX for digital modes including AMTOR, PACTOR, packet, and Baudot radioteletype. An Azden PCS-2000 was set up as a 2 meter packet mailbox. I also operated 439 MHz fast scan amateur TV using a modified Motorola Mocom transmitter with a homebrew video modulator through the local WBØHEU repeater. The antennas were inverted vees and a Hy-Gain 14AVQ vertical until I moved in March 1997 to a location 1 mile north of Father Flanagan's Boys Town a National Historic Landmark featured in the classic 1938 movie "Boys Town" starring Spencer Tracy and Mickey Rooney. The antennas there were full wave loops for 20 meters and 40 meters in the attic. These are described in my antenna modeling article.

KP4MD in California in 1999-

In 1999 I moved to the Greater Sacramento area and was inactive until 2006. I am active on HF with the Kenwood TS-140S and a High Sierra Sidekick vertical antenna. I enjoy CW and the new PSK modes at home and operating mobile on 20 through 6 meters using an Alinco DX-70TH Transceiver and a Comet CA-HV mobile whip.

Original bibliography

"Computer Assisted Low Profile Antenna Modeling", unpublished. Using the MININEC program to design attic antennas.
"PET ASCII Output Program for the Timex/Sinclair ZX81", Syncware News, Vol 3:3, January-February 1986. A Z80 machine language program to port ZX81 programs and data to other computers.
"Audio Frequency Counter Program for the Timex/Sinclair ZX81", Syncware News, Vol 3:1, September-October 1985. QZX, Vol 2:11, October 1984. A Z80 machine language program to use the ZX81 as an audio frequency counter.
"Chebyshev/Butterworth Filter Design", unpublished. An IBM BASIC program to design Chebyshev and Butterworth low-pass, high-pass, band-pass and band-stop filters.
"Butterworth Filter Design", QZX, Vol 2:4, March 1984, pp. 3-5. A Sinclair BASIC program to design Butterworth low-pass, high-pass, band-pass and band-stop filters.
"Phased Vertical Antenna Patterns", QZX, Vol 2:3, February 1984, p. 2. A Sinclair BASIC program to print radiation pattern plots for phased vertical antenna arrays.
"Programming for Automated Satellite Communication", ham radio, Vol 11:6, June 1978, pp. 68-71. Algorithm for a satellite locating program for the Texas Instruments SR-52 programmable calculator.
"Un Programa para Rastrear Los Satélites Oscar Utilizando la Calculadora SR-52 de Texas Instruments", Onda Terrestre, Vol 31:1, May-June 1977, p. 10.
"A Simple Bandpass Filter for 439 MHz", A5, Vol 5:3, May-June 1975, p. 30. A tunable stripline filter in a Minibox for ATV.
"Using the BC-645 on ATV", A5, Vol 5:2, March-April 1975, pp. 3-5. Modifying a WWII surplus IFF transponder for amateur TV transmission.

KP4MD Station Equipment

Home • HF • VHF	Mobile • HF • VHF
80m 60m 40m 30m 20m 17m 15m 12m 10m 2m 75cm	40m 20m 17m 15m 10m 6m 2m 75cm
Modes: LSB USB CW AM FM Digital	Modes: LSB USB CW AM FM
Transmitters:	Transmitters:
• Kenwood TS-140S Transceiver • Heathkit SB-610 Station Monitor	• Alinco DX-70TH Transceiver
• MFJ-949B Antenna Tuner	• Icom IC-W21AT Transceiver
• Icom IC-W21AT Transceiver • Henry Radio 30A02 Amplifier
Antennas:	Antennas:
• High Sierra Sidekick	• Comet CA-HV 40-6m mobile whip
• Random wire	• ¼ wave 2 meter vertical
• Arrow OSJ 146/440 J-Pole
Power: • 1W • 5W • 50W • 100W	Power: • 1W • 5W • 50W • 100W
Digital Modes • PACTOR • AMTOR • Packet • Baudot • PSK31 • AEA PK-232MBX PSK Data Controller

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Last Update 3 JUL 2007.

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