VHF/UHF WSPR Study Group

Young Ladies' Radio League
Young Ladies' Radio League

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 KP4MD on eQSL.cc · KP4MD on Google+ · KP4MD on QRZ.COM · KP4MD on YouTube
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

Site Map
Op: Carol
Log Highlights
Amateur Radio in Puerto Rico
Leo Meyerson, WØGFQ, Radio Pioneer

Comparative Antenna Analysis with WSPR
Full Wave Attic Loop Antenna NEC4WIN Model
Full Wave 40m Loop Antenna 4nec2 Model
14-30 MHz Magnetic Loop Antenna
Magnetic Loop Antenna Parameters: 7-30 MHz
100-1300 MHz Discone Antenna & NEC Model
144 MHz Halo Antenna & NEC Model
144 MHz Magnetic Loop Antenna for Direction Finding
144 MHz Omnidirectional Horizontal Antennas
50 MHz Halo Antenna & NEC Model
70 cm 5 Element Yagi Antenna
Comparison of Flexible VHF/UHF Antennas
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
144 MHz WSPR Study
WSPR Spot Reports
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
American Radio Relay League

River City Amateur Radio Communications Society

Medical Amateur
          Radio Council
Medical Amateur Radio Council

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

Arecibo Observatory

"An Insider Tour of the Arecibo Observatory"
at 2014 ARRL Pacificon Convention

At the 2014 ARRL Pacificon Convention this 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.

WB2OZA QSL ca. 1970 Highlights from the Logbook

WB2OZA in New York in 1970-1976

Was a member of the Communications Club of New Rochelle, NY (K2YCJ) and the Tu-Boro Radio Club of Whitestone, Queens, NY (W2BMW).

          1978Station in Rio
          Piedras, Puerto Rico, 1979KP4EMN/KP4MD in Puerto Rico in 1976-1987

KP4MD Amateur Extra Radio Operator License, 10/3/1974Station in Omaha,
          Nebraska, 1989KP4MD in Nebraska in 1987-1999

KP4MD in California in 1999-

Operating Digital
        Modes with the Ham Radio Deluxe Software, July, 2010
Home • 160m 80m 60m 40m 30m 20m 17m 15m 12m 10m 6m 2m 70cm Mobile • 2m 70cm
Modes: LSB USB CW AM FM • Baudot • Digital modes •
WSPR 144.490510 MHz (432.301510 MHz on Wednesdays) WSPR Spot Reports
Modes: FM
Equipment: Kenwood TS-450S Transceiver Yaesu FT-8800R Transceiver
FlexRadio 1500/3000Elecraft XV144 TransverterDown East Microwave L432-28HP Transverter
Equipment: Yaesu FT-8800R Transceiver
Antennas: 40 meter horizontal loop High Sierra Sidekick Arrow OSJ 146/440 J-Pole
Stacked 2 meter Halo Antennas5 element 432 MHz YagiWaveNode WN-2 SWR/Power Analyzer
Antenna: • ¼ wave 2 meter vertical
Power: • 1W  • 5W • 50W  • 100W Power: • 5W • 10W  • 50W

Original bibliography

  1. "Sonobuoy Fox Hunt Transmitter", Posted 24 Jan 2015.  Arduino Microcontroller and Military Surplus Transmitter Use for Hidden Transmitter Hunts.
  2. "144 MHz Magnetic Loop Antenna for Direction Finding", Posted 10 Jan 2015.  Photo Journal
  3. "Frequency Deviation Measurement with an RTL-SDR Dongle", Posted 25 Dec 2014.  Frequency deviation measurement using the RTL-SDR as a service monitor.
  4. "Magnetic Loop Antenna Parameters: 7-30 MHz", Posted 20 Sep 2014.  Magnetic Loop Antenna Parameters Measured with a Vector Network Analyzer
  5. "Power Pack for Amateur Radio Field Operation", Posted 10 Jul 2014.  Low Cost Emergency Power Pack for Field Deployment of Amateur Radio
  6. "Comparison of Flexible VHF/UHF Antennas", Posted 1 Jun 2014.  Some Comparative Measurements with the MiniVNA Pro
  7. "An Elliptical Medium Wave Bandstop Filter in an Altoids Box", Posted 24 May 2014.  Design and Construction of an Elliptical Medium Wave Band Stop Filter
  8. "MiniVNA Calibration", Posted 23 Mar 2014.  Vector network analyzer calibration basics for transmission mode measurements
  9. "50 MHz Halo Antenna & NEC Model", Posted 15 Mar 2014.  Construction and Analysis of Halo Antenna for 50 MHz
  10. 70 cm 5 Element Yagi Antenna, Posted 10 Dec 2013.  Photo Journal
  11. Down East Microwave L432-28HP Transverter, Posted 11 Nov 2013.  Photo Journal
  12. "Computer Headset/Microphone Adapter for FlexRadio 1500 and 3000", Posted 6 Oct 2013.  PowerSDR Yields Quality Audio with a Low-Cost Computer/Gaming Headset/Microphone
  13. "Interpreting WSPR Data for Other Communication Modes", Posted 29 Aug 2013.  Using the Weak Signal Propagation Reporter Network to Estimate Suitability of Radio Propagation Conditions for other Communication Modes
  14. "Calculating Unknown Capacitance and Inductance with miniVNA", Posted 10 Aug 2013.  Method using Spreadsheet Data exported from the miniVNA Vector Network Analyzer
  15. "An Improvised 100-1300 MHz Discone Antenna", Posted 02 Mar 2013.  NEC Model Design and Construction of a Low Cost Omnidirectional Antenna for 100-1300 MHz
  16. "144 MHz Omnidirectional Horizontal Antennas", Posted 05 Jan 2013.  NEC Model Comparisons of Stacked Halo, Turnstile and Eggbeater Omnidirectional Horizontally Polarized Antennas for 144 MHz
  17. "The RM Italy KL-145 Linear Amplifier in Digital Mode Operation", Posted 16 Oct 2012.  140-152 MHz Linear Amplifier Performance in WSPR Mode
  18. "Doppler Frequency Shift Observation of the VO-52 Orbiting Satellite", Posted 11 Sep 2012.  Application of Amateur Radio in Geophysics
  19. "144 MHz WSPR Propagation Study", Posted 14 June 2012.  Observations of VHF Propagation using WSPR
  20. "Building the Elecraft XV144 Transverter Kit", Posted 28 May 2012.  Construction of a 28 MHz to 144 MHz Transmitting and Receiving Converter
  21. "A Low Profile 144 MHz Halo Antenna", Posted 23 May 2012.  NEC Model Design, Construction and Analysis of Stacked Halo Antennas for 144 MHz
  22. "A Universal HF Magnetic Loop Antenna NEC Model", Posted 16 September 2011.  Design of a NEC Model for Small High Frequency Magnetic Loop Antennas
  23. "14-30 MHz Magnetic Loop Antenna", Posted 03 September 2012.  Construction of a Compact and Efficient Portable High Frequency Antenna
  24. "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
  25. "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
  26. "Modeling Commercial Amateur Radio Antennas", Posted August 2011.  Evaluating the Arrow OSJ146/440 J-Pole, Cushcraft R7 Vertical, Diamond D130J (Icom AH7000) Discone, High Sierra Sidekick Screwdriver and Hamstick Dipole Performance Through NEC Modeling
  27. "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
  28. "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
  29. "Measuring the MFJ-949B Antenna Tuner", Posted 18 February 2011.  Determining the Capacitance and Inductance Ranges of this T-Network Antenna Tuning Unit
  30. "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.
  31. "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.
  32. "HAARP – LWA Moon Bounce Experiment 19-20 JAN 2008", presented 6 February 2008 at River City Amateur Radio Communications Society.
  33. "Computer Assisted Low Profile Antenna Modeling I", Posted 13 June 1998. Using the MININEC program to design attic antennas.
  34. "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.
  35. "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.
  36. "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.
  37. "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.
  38. "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.
  39. "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.
  40. "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.
  41. "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.
  42. "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.

Uploaded with Ham Radio Deluxe logging software
KP4MD Logbook at HRDLOG.net
KP4MD Worked Countries Map
Click for WSPR Spot Reports
KP4MD WSPR Spot Reports

Do you
                    QSL via burro?

"Do you QSL via burro?"


This doctored photograph won Marconi the patent rights for radio
Uncyclopedia story on Guglielmo Marconi

You are visitor number

count started 10 OCT 2010
On QSL.NET since 05 APR 1998
Updated 17 JAN 2015