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ARS KP4MD




Amateur Radio Station KP4MD



Online Bibliography


ORIGINAL BIBLIOGRAPHY

 1.  4nec2 Model Analysis of Quadcopter 'Range Extender' Antennas, posted 22 Mar
     2022.  Aftermarket 2.4 and 5.8 GHz Antennas for Miniature UAV Controllers.

 2.  Butterworth 24 MHz Bandstop Filter in an Altoids Tin (Photoblog), posted 24
     Jun 2020.  Filter to suppress 23-25 MHz RFI in a KiwiSDR.

 3.  KiwiSDR and WsprDaemon at KP4MD (Photoblog), posted 22 May 2020.  The
     KiwiSDR and WsprDaemon at KP4MD decodes and uploads WSPR spots on multiple
     bands simultaneously.

 4.  222 MHz Helical Bandpass Filter in an Altoids Tin (Photoblog), posted 24
     Dec 2018.  A triple tuned bandpass filter for the 222-225 MHz band in an
     Altoids tin to suppress harmonics and spurious intermodulation emissions.

 5.  Tarheel 100A-HP Screwdriver Antenna (Photoblog), posted 28 Mar 2018. 
     Mounting and measurements of a shortened electrical 1/4-wave vertical
     monopole antenna with a remotely controlled continuously adjustable center
     loading inductor.

 6.  Telonic TS-200A Coaxial Switch (Photoblog), posted 27 Oct 2016.  A single
     pole six position rotary switch with BNC connectors with VSWR <1.1:1,
     insertion loss < 0.1 dB, and port isolation >70 dB through 1 GHz.

 7.  2016 ARRL Pacificon Presentation "Introduction to WSPR", Slideshow
     presented 15 Oct 2016.

 8.  Smart Meter Interference to 902-928 MHz (Video), posted 18 Aug 2016.  The
     uncontrolled proliferation of Smart Meters by utility companies causes
     increasing illegal interference to licensed users of the ITU Region 2
     902-928 MHz amateur radio band.

 9.  Review of the CX-3 1000 Watt Coaxial Antenna Switch (Photoblog), posted 06
     Aug 2016.  The stray capacitance and inductive coupling between the
     unshielded hook up wires adversely affects the impedance and isolation
     between the ports of this switch.

 10. Homebrew Coaxial Crossover Switch in an Altoids Tin (Photoblog), posted 19
     Jul 2016.  The measured port to port isolation surpasses that published in
     the January 2011 QST review of the MFJ-1703 switch.

 11. Balcony Mounted Buddistick Antenna (Photoblog), posted 30 Jun 2016.  Tests
     with a Buddistick 9.5 foot inductively loaded monopole antenna mounted on a
     metal balcony rail.

 12. $4 Homebrew 50 ohm Feed Through Terminator (Photoblog), posted 19 Feb
     2016.  Using a solder type BNC plug, chassis-mount BNC jack and two 100 ohm
     1/8 watt resistors. VSWR < 1.18:1 up to 200 MHz.

 13. Preservation of 144 MHz Radio Wave Polarization Sense (Photoblog), posted
     26 Jan 2016.  A 144 MHz WSPR study demonstrates the preservation of radio
     wave polarization over a 136 km path obstructed by mountain ranges.

 14. 10 MHz Low Pass Filter Performance Test with Oscilloscope (Video), posted
     25 Dec 2015.  A Rigol DS1102E Oscilloscope is used to test the frequency
     response of a homebrew 3 pole Butterworth low pass filter for 10 MHz built
     into Altoids box.

 15. G8JNJ 432 MHz Mixed Mode Helical Antenna NEC Model, posted 04 Nov 2015. 
     Demonstration of NEC-2 GH Helix Card

 16. 4nec2 Antenna Modeling of Near Field Antenna Interaction (Video), posted 01
     Nov 2015.  Demonstration of the effect of near field interaction on the
     radiation patterns of a magnetic loop and Buddipole antenna on 14 MHz.

 17. Signal Level Measurement with PowerSDR and External Transverters, posted 30
     Aug 2015.  Using a Wideband Noise Source to Calibrate PowerSDR Signal Level
     Measurements with External Transverters

 18. U.S. Overseas Territories Amateur Radio License Data, posted 07 Aug 2015. 
     US Territorial Amateur Radio License Statistics Inside and Outside the 48
     Continental United States

 19. The Balcony Mounted Magnetic Loop Antenna, posted 12 Jun 2015.  A NEC Model
     Comparative Analysis of Physical Orientation and Performance

 20. Chameleon CHA F-Loop Antenna Parameters: 5-30 MHz, posted 30 May 2015. 
     Antenna Parameters Measured with a Vector Network Analyzer

 21. "10 Watt 50 ohm QRP Dummy Load with 40 dB Attenuator", Posted 28 Mar 2015. 
     Ten watt 50 ohm dummy load (SWR 1.03:1 or better up to 200 MHz) with 40 dB
     Attenuator in an Altoids box for frequency and power measurements.

 22. Fox Delta FC-3 Frequency Counter and Power Meter Performance (Photoblog),
     posted 21 Mar 2015.  Characterization of measurement accuracy, frequency
     stability and linearity.

 23. "Sonobuoy Fox Hunt Transmitter", Posted 24 Jan 2015.  Arduino
     Microcontroller and Military Surplus Transmitter Use for Hidden Transmitter
     Hunts.

 24. "144 MHz Magnetic Loop Antenna for Direction Finding", Posted 10 Jan 2015. 
     Photo Journal

 25. "Frequency Deviation Measurement with an RTL-SDR Dongle", Posted 25 Dec
     2014.  Frequency deviation measurement using the RTL-SDR as a service
     monitor.

 26. "Magnetic Loop Antenna Parameters: 7-30 MHz", Posted 20 Sep 2014.  Magnetic
     Loop Antenna Parameters Measured with a Vector Network Analyzer

 27. Comet CF-360 Duplexer: Schematic Diagram and Circuit Analysis (Photoblog),
     posted 22 Jul 2014.

 28. "Power Pack for Amateur Radio Field Operation", Posted 10 Jul 2014.  Low
     Cost Emergency Power Pack for Field Deployment of Amateur Radio

 29. "Comparison of Flexible VHF/UHF Antennas", Posted 1 Jun 2014.  Some
     Comparative Measurements with the MiniVNA Pro

 30. "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

 31. "MiniVNA Calibration", Posted 23 Mar 2014.  Vector network analyzer
     calibration basics for transmission mode measurements

 32. "50 MHz Halo Antenna & NEC Model", Posted 15 Mar 2014.  Construction and
     Analysis of Halo Antenna for 50 MHz

 33. 70 cm 5 Element Yagi Antenna, Posted 10 Dec 2013.  Photo Journal

 34. Down East Microwave L432-28HP Transverter, Posted 11 Nov 2013.  Photo
     Journal

 35. "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

 36. "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

 37. "Calculating Unknown Capacitance and Inductance with miniVNA", Posted 10
     Aug 2013.  Method using Spreadsheet Data exported from the miniVNA Vector
     Network Analyzer

 38. "Low Pass Filter for FlexRadio 10 MHz External Frequency Reference (CC)
     (Video)", Posted 21 July 2013.  Design, construction and performance
     measurement of a 10 MHz Low Pass Filter in an Altoids Box

 39. "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

 40. "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

 41. "The RM Italy KL-145 Linear Amplifier in Digital Mode Operation", Posted 16
     Oct 2012.  140-152 MHz Linear Amplifier Performance in WSPR Mode

 42. "Doppler Frequency Shift Observation of the VO-52 Orbiting Satellite",
     Posted 11 Sep 2012.  Application of Amateur Radio in Geophysics

 43. "WSPR Spot Report Analysis Spreadsheet", Posted 21 August 2012. 
     User-defined Chart and Statistical Analysis of Online WSPR Spot Database
     (Requires Microsoft Excel 2000 or later)

 44. "144 MHz WSPR Propagation Study", Posted 14 June 2012.  Observations of VHF
     Propagation using WSPR

 45. "Building the Elecraft XV144 Transverter Kit", Posted 28 May 2012. 
     Construction of a 28 MHz to 144 MHz Transmitting and Receiving Converter

 46. "A Low Profile 144 MHz Halo Antenna", Posted 23 May 2012.  NEC Model
     Design, Construction and Analysis of Stacked Halo Antennas for 144 MHz

 47. "A Universal HF Magnetic Loop Antenna NEC Model", Posted 16 September
     2011.  Design of a NEC Model for Small High Frequency Magnetic Loop
     Antennas

 48. "14-30 MHz Magnetic Loop Antenna", Posted 03 September 2012.  Construction
     of a Compact and Efficient Portable High Frequency Antenna

 49. "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

 50. "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

 51. "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

 52. "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

 53. "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

 54. "Measuring the MFJ-949B Antenna Tuner", Posted 18 February 2011. 
     Determining the Capacitance and Inductance Ranges of this T-Network Antenna
     Tuning Unit

 55. "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.

 56. "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.

 57. "HAARP – LWA Moon Bounce Experiment 19-20 JAN 2008", presented 6 February
     2008 at River City Amateur Radio Communications Society.

 58. "Computer Assisted Low Profile Antenna Modeling I", Posted 13 June 1998.
     Using the MININEC program to design attic antennas.

 59. "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.

 60. "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.

 61. "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.

 62. "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.

 63. "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.

 64. "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.

 65. "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.

 66. "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.

 67. "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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