Amateur Radio Station KP4MD Op: Carol Milazzo - YL QTH: Citrus Heights, California, USA Sacramento County CQ Zone 3, ITU Zone 6 Locator CM98iq  38.68° N 121.33° W ex-WB2OZA(1970-76) ex-KP4EGZ(1975) KP4EMN(1976-78) · EchoLink Node: 307417 KP4MD on · · English Memberships American Radio Relay League (Life) Medical Amateur Radio Council Ak-Sar-Ben Radio Club (Life) 10-X International Net No. 7616 Military Auxiliary Radio System Young Ladies' Radio League River City Amateur Radio Comm. Society Español Site Map Op: Carol Log Highlights Amateur Radio in Puerto Rico Leo Meyerson, WØGFQ, Radio Pioneer ANTENNA MODELING AND ANALYSIS Comparative Antenna Analysis with WSPR Full Wave Attic Loop Antenna NEC4WIN Model Full Wave 40m Loop Antenna 4nec2 Model 144 MHz Halo Antenna & NEC Model Measuring the MFJ-949B Antenna Tuner MFJ-202 Noise Bridge Antenna Analysis Modeling Commercial Amateur Radio Antennas Universal HF Magnetic Loop Antenna NEC Model Zip Cord Transmission Lines and Baluns WSPR Spot Reports WB2OZA in New York KP4MD in Puerto Rico KP4MD in Nebraska KP4MD in California Original bibliography Online Logbook WSPR Spot Reports Photo Gallery · Videos QSL cards · New QSLs

Visits since 10 OCT 2010 On QSL.NET since 05 APR 1998

"An Insider Tour of the Arecibo Observatory" at ARRL Pacificon

At the Pacificon Convention the 40-minute documentary "An Insider Tour of the Arecibo Observatory." Filmed on location, retired engineer Bob Zimmerman, NP4B narrates an exclusive inside look into the communications technology and workings of this famous world's largest radio telescope in Puerto Rico,
The National Astronomy and Ionosphere Center.

Highlights from the Logbook

WB2OZA in New York in 1970-1976

• NOV 1969 - Issued Shortwave Listener Certificate, WPE2RDU.  QTH: Throgg's Neck, Bronx, NY Grid square FN30ct
• MAY 1970 - First amateur radio license, Technician class, WB2OZA.
• 21 NOV 1970 - First log entry WA2HLF on 145 MHz AM.  Equipment: Knight-Kit TR-108 & V-107 VFO, later added a Heathkit Sixer and Lafayette HA-460.  Antennas: Hy-Gain 8 element 2m Yagi and 4 element 6m Yagi.
• 12-14 JUN 1971 - First place ARRL June VHF QSO Party NYC-LI Section
• 20 JUL 1971 - Upgraded to Advanced class.  Added: World Radio Labs Globe Chief transmitter, homebrew plate modulator, Allied A-2515 receiver. Antennas: 75 foot flat-top, Hy-Gain 14AVQ vertical up 15 AUG 1971
• 18 AUG 1971 - First 2m FM repeater QSO with K2VZG via WA2SUR 146.19/73 MHz FM repeater, on the TR-108 modulating the V-107 VFO.
• 02 NOV 1971 - Added: surplus 2 watt sonobuoy transmitter on 2m FM.  25 MAR 1972 QSO with WA2DHF via WA2KEC repeater 146.40/995 MHz.
• 16 MAY 1972 - Added: Heathkit HW-101 HF CW/SSB    03 MAR 1973 - Added Swan FM-2X, Cush Craft 2m Ringo antenna.
• 29 AUG 1972 - 10 MAR 1976 - Operated voice and AFSK RTTY on 6m US Air Force MARS net 11NYA11 (AFC2OZA) - taught Novice license classes at Fordham University club station K2FO. John A. Ross IV, WB2K was one of our students.
• 03 SEP 1973 - First fast scan amateur television contact with WB2DTT on 439.25 MHz.  Transmitter: modified Motorola T44AAV commercial UHF transceiver, WWII surplus BC-645 IFF transponder.  Antenna: Cush-Craft 20 element collinear.
• 17 MAY 1974 - Added: Unimetrics Ultracom-25 2m FM and GLB Synthesizer.    08-10 JUN 1974 - Third place 1974 ARRL June VHF QSO Party NYC-LI Section.
• 30 JUL 1974 - Upgraded to Amateur Extra class.
• 16 AUG 1974 - 02 SEP 1974 - Operated WB2OZA/KP4 from Ceiba, Puerto Rico Grid square FK78eg
• Participated with WA2BLM multi-op station in White Plains, NY in the Sept 1974, June and Sept 1975 ARRL VHF QSO Parties, and the 1975 ARRL VHF Sweepstakes.
• 18 JUN 1975 - First AM QSO on 432 MHz with WB2MDR.  Knight TR-108 into a varactor tripler, Janel receiving converter.
• 11 AUG 1975 - 02 SEP 1975 - Operated WB2OZA/KP4 from Ceiba, Puerto Rico Grid square FK78eg (Secondary station callsign KP4EGZ issued 19 AUG 1975)
• 10 OCT 1975 - First SSB QSO on 6m with WB2GKB.  Heath HW-101 driving homebrew transverter. Built Micro-TO MK II electronic keyer from September 1975 QST article.

KP4EMN/KP4MD in Puerto Rico in 1976-1987

• 01 AUG 1976 - Moved to Carolina, Puerto Rico (secondary station callsign KP4EMN issued 29 JUN 1976), Grid square FK78aj.  Equipment: Heathkit HW-101 with a fan inverted vee antenna. Unimetrics Ultracom 25, GLB synthesizer and homebrew 2m groundplane.  Agustín Santana KP4CKY and his son, Papo KP4EQG, later WP4Q, were neighbors, whose memory I dearly honor on this web page in Memoriam of WP4Q.
• 18 JAN 1977 - 31 AUG 1979 - As Air Force MARS station AFP4MD, then AFAØAF, operated on TRANSCON net and ran weekly phone patches with AHA6AIR at Howard Air Force Base for servicemen in the Panama Canal Zone.
• 27 JAN 1977 - First Oscar 6 satellite QSO with W2BXA (New Jersey), keyed Ultracom-25 PTT line for CW on 145.90 MHz uplink.
• APR 1977 - Article "Programming for Automated Satellite Communication" submitted to journal Ham Radio, published in JUN 1978 issue
• 10 JUN 1977 - KP4EGZ call changed to KP4MD under Amateur Extra 2 letter callsign incentive.
• 01 AUG 1977 - Moved to Urb. Hyde Park Río Piedras, Puerto Rico then Urb. Reparto Metropolitano Grid square FK68xj in MAR 1978.  Set up a Heathkit HW-7 as a 1 watt CW beacon on 21.225 MHz.  Joined Medical Amateur Radio Council, The Radio Club of Puerto Rico and Grupo Repetidor El Taino KP4DPA repeater 146.01/61 MHz
• DEC 1980 - Moved to the Regional Hospital at Bayamón, Puerto Rico Grid square FK68wi
• AUG 1983 - Joined the U.S. Navy Medical Corps,  moved to U.S. Naval Station Roosevelt Roads, Puerto Rico Grid square FK78ee.  Equipment: Heathkit HW-101, SB-200 linear amplifier, Azden PCS-2000 2m FM.  Antennas: Hy-Gain 14AVQ vertical, 80m dipole, 2m Ringo vertical.  Operated a simplex phone patch on 145.00 MHz.
• 14 JAN 1985 - Transferred to Navy MARS, callsign NNNØRSD.

KP4MD in Nebraska in 1987-1999

• JUL 1987 - Separated from the Navy, moved to Florence, Nebraska, Grid square EN21ai.  Joined the Ak-Sar-Ben Amateur Radio Club, the faculty of the Creighton University School of Medicine and Charles Drew Health Center. Equipment: Heath HW-101, Kenwood TS-140S HF transceiver, Heath SB-1000 linear amplifier, Heathkit SB-610 Station Monitor, Heath SA-2060A tuner, Azden PCS-2000.  Antennas: Fan dipoles, 2m Ringo.
• SEP 1989 - Transmission through ATV repeater WBØHEU on 439.25 MHz.  Equipment: modified Motorola Mocom 10 transmitter with a homebrew video modulator. Ham Hum, Vol 39:10, October 1989.
• 29 NOV 1989 - Added AMTOR, PACTOR, HF and VHF packet modes.  TNC: AEA-PK232MBX Software: LanLink
• 01 MAR 1997 - Moved to west Omaha, Nebraska, Grid square EN11wg, 1 mile north of Boys Town.  Antennas:  full wave attic loops for 20 meters and 40 meters, described in "Computer Assisted Low Profile Antenna Modeling".

KP4MD in California in 1999-

Home • 160m 80m 60m 40m 30m 20m 17m 15m 12m 10m 6m 2m 75cm	Mobile • 40m 20m 17m 15m 10m 6m 2m 75cm
Modes: LSB USB CW AM FM • Baudot • Digital modes • WSPR	Modes: LSB USB CW AM FM
Equipment: • Kenwood TS-140S Transceiver • Heathkit SB-610 Station Monitor • Yaesu FT-8800R Transceiver • AEA PK-232MBX PSK Data Controller • Bearcat 210XLT Scanner	Equipment: • Alinco DX-70TH Transceiver • Icom IC-W21AT Transceiver • Henry Radio 30A02 Amplifier
Antennas: • 40 meter horizontal loop • High Sierra Sidekick • MFJ-949B Antenna Tuner • Arrow OSJ 146/440 J-Pole • Knight P-2 SWR/Power Meter	Antennas: • ¼ wave 2 meter vertical • Comet CA-HV 40-6m mobile whip
Power: • 1W  • 5W • 50W  • 100W	Power: • 1W  • 5W • 50W  • 100W

• 01 JUL 1999 - Moved to Folsom, CA, Grid square CM98kp.
• 01 DEC 2005 - Moved  to Citrus Heights, CA Grid square CM98iq.
• 23 JUL 2006 - Resumed HF operation.  Equipment: Kenwood TS-140S and High Sierra Sidekick vertical antenna. Joined the River City Amateur Radio Communications Society
• 09 AUG 2006 - First PSK31 QSO with VA7CRH on 20m.  Added Timewave PSK sound card interface to AEA PK-232MBX, software Digipan v2.0
• 20 JAN 2008 - Participated in HAARP – LWA Moon Bounce Experiment, presented at River City Amateur Radio Communications Society in February 2008
• 10 JUL 2010 - Added integrated digital control, logging and digital modes to Kenwood TS-140S with the Piexx IF-10 serial interface board, software: Ham Radio Deluxe v5.0
• 22 AUG 2010 - Long Delayed Echoes were heard today at 2120 UTC on my PSK31 transmissions with 9A5LO/P on 18.100 MHz
• 11 SEP 2010 - Erected 40 meter horizontal loop antenna, described in "Computer Assisted Low Profile Antenna Modeling II"
• 17 OCT 2010 - Commenced participation in WSPR Weak Signal Propagation Reporter Network
• 05 FEB 2011 - Commenced frequency hopping mode on WSPR network
• 04 MAY 2012 - Spotted W8TOD/BG1 running 1 watt WSPR in Beijing, China on 7.040059 MHz

Original bibliography

1. "Building the Elecraft XV144 Transverter Kit", Posted 28 May 2012.  Construction of a 28 MHz to 144 MHz Transmitting and Receiving Converter
2. "A Low Profile 144 MHz Halo Antenna", Posted 23 May 2012.  NEC Model Design and Construction of Stacked Halo Antennas for 144 MHz
3. "A Universal HF Magnetic Loop Antenna NEC Model", Posted 16 September 2011.  Design of a NEC Model for Small High Frequency Magnetic Loop Antennas
4. "Aligning the Henry Radio 30A02 RF Amplifier", Posted 4 September 2011.  A schematic diagram and alignment procedure for the Henry Radio 30A02 VHF RF Amplifier
5. "A Low Pass RF Filter in an Altoids Box", Posted 28 August 2011.  Design and Construction of a Low Pass Filter for the Low Frequency RF Spectrum
6. "Modeling Commercial Amateur Radio Antennas", Posted August 2011.  Evaluating the Cushcraft R7 Vertical, High Sierra Sidekick Screwdriver and Hamstick Dipole Performance Through NEC Modeling
7. "Zip Cord Transmission Lines and Baluns", Posted August 2011.  An Analysis of a Low Cost Speaker Wire with Common Mode Chokes as a High Frequency Transmission Line
8. "Antenna System Measurements with the MFJ-202B RX Noise Bridge", Posted March 2011.  RX Noise Bridge Calibration and Applications in Antenna and Transmission Line Measurements
9. "Measuring the MFJ-949B Antenna Tuner", Posted 18 February 2011.  Determining the Capacitance and Inductance Ranges of this T-Network Antenna Tuning Unit
10. "Comparative Antenna Analysis with WSPR", presented 1 March 2011 at River City Amateur Radio Communications Society. Using the Weak Signal Propagation Reporter Network to Compare Antenna Performance.
11. "Computer Assisted Low Profile Antenna Modeling II", Posted 25 September 2010. Using the 4nec2 program to design a low profile horizontal loop antenna for a limited space backyard.
12. "HAARP – LWA Moon Bounce Experiment 19-20 JAN 2008", presented 6 February 2008 at River City Amateur Radio Communications Society.
13. "Computer Assisted Low Profile Antenna Modeling I", Posted 13 June 1998. Using the MININEC program to design attic antennas.
14. "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.
15. "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.
16. "Chebyshev/Butterworth Filter Design", Posted 10 July 1998. An IBM BASIC program to design Chebyshev and Butterworth low-pass, high-pass, band-pass and band-stop filters.
17. "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.
18. "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.
19. "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.
20. "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.
21. "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.
22. "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.

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