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Carol F. Milazzo
Works at Amateur Radio Station KP4MD
Attended University of Puerto Rico School of Medicine, San Juan, PR
Lives in Citrus Heights, CA
1,059 followers|6,096,689 views
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This object of this study was to obtain accurate signal and noise floor measurement using a FlexRadio 1500 transceiver with external transverters, an Elecraft XV144 for 144 MHz and a Down East Microwave L432-28HP for 432 MHz.  With a single frequency source of known amplitude applied to the receiver, the RX Gain (dB) may be adjusted until the receive signal meter indicates the known power level.  This study uses an alternate method, a wideband RF noise source, to accurately characterize the transverter conversion gain and noise figure.
#hamradio  
Using a Wideband Noise Source to Calibrate PowerSDR Signal Level Measurements with External Transverters
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Carol F. Milazzo

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This object of this study was to obtain accurate signal and noise floor measurement using a FlexRadio 1500 transceiver with external transverters, an Elecraft XV144 for 144 MHz and a Down East Microwave L432-28HP for 432 MHz.  With a single frequency source of known amplitude applied to the receiver, the RX Gain (dB) may be adjusted until the receive signal meter indicates the known power level.  This study uses an alternate method, a wideband RF noise source, to accurately characterize the transverter conversion gain and noise figure.
#hamradio  
Using a Wideband Noise Source to Calibrate PowerSDR Signal Level Measurements with External Transverters
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"Ask an Elmer"  Have an Amateur Radio Question?  
Post it in this community for assistance.
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September 1 7:30 pm Meeting Program
Bob Hess, W1RH, President of the Northern California Contest Club speaks on the 50th Anniversary California QSO Party & the ARRL Official Observer Program!
Meetings are the 1st Tuesday of each month
Join us for refreshments and great company!
http://www.n6na.org/meetings
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I finally took the time to learn how to correctly upload the 1,907 QSOs in my Ham Radio Deluxe Logbook since 2006 to ARRL Logbook of the World.  
http://www.hrdlog.net/ViewLogbook.aspx?user=kp4md
http://lotw.arrl.org
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Matt Rainey's profile photoDavid Witkowski's profile photoRichard Slusher's profile photoCarol F. Milazzo's profile photo
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It's only tough to set up that first time. After that you can do a backup of the settings then restore those settings on multiple machines. I've got it installed on my work laptop, my desktop and my radio laptop.
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Demonstration of directional signal nulls of a shielded H-field loop antenna.
0:00 Signal is maximum with the loop antenna vertically oriented in the plane pointing toward the transmitter.
0:05 A signal null occurs with the antenna rotated 90° to the transmitter source.
0:09 Signal strength returns to maximum with the loop antenna plane rotated toward the transmitter.
0:14 When oriented in the horizontal plane, the loop rejects vertically polarized signals from all directions.
https://picasaweb.google.com/114032640816757126398/MultiTurnLoopAntenna
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Carol F. Milazzo

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I've been asked to identify the application of this 144 mm diameter Loop "antenna". The non-ferrous 6 mm diameter hollow loop contains eight turns of insulated stranded wire. The RG-58A/U coaxial cable is terminated with a UG88/U BNC male connector.  Any ideas?
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Mike Murphree's profile photoTodd Carpenter's profile photoCarol F. Milazzo's profile photo
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Demo of this Shielded H-Field Loop Antenna https://www.youtube.com/watch?v=SmmRdNy0XsE
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This object of this study was to obtain accurate signal and noise floor measurement using a FlexRadio 1500 transceiver with external transverters, an Elecraft XV144 for 144 MHz and a Down East Microwave L432-28HP for 432 MHz.  With a single frequency source of known amplitude applied to the receiver, the RX Gain (dB) may be adjusted until the receive signal meter indicates the known power level.  This study uses an alternate method, a wideband RF noise source, to accurately characterize the transverter conversion gain and noise figure.
#hamradio  
Using a Wideband Noise Source to Calibrate PowerSDR Signal Level Measurements with External Transverters
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The River City ARCS ark and animals have been seen moonlighting on HamCity.com Tee shirts
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Carol F. Milazzo

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I finally took the time to learn how to correctly upload the 1,907 QSOs in my Ham Radio Deluxe Logbook since 2006 to ARRL Logbook of the World.  
http://www.hrdlog.net/ViewLogbook.aspx?user=kp4md
http://lotw.arrl.org
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Koos van den Hout's profile photodavid m (KK4ZUU)'s profile photo
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I get a MUCH higher QSL rate on LoTW than _RZ
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Carol F. Milazzo

Technical References  - 
 
Demonstration of directional signal nulls of a shielded H-field loop antenna.
0:00 Signal is maximum with the loop antenna vertically oriented in the plane pointing toward the transmitter.
0:05 A signal null occurs with the antenna rotated 90° to the transmitter source.
0:09 Signal strength returns to maximum with the loop antenna plane rotated toward the transmitter.
0:14 When oriented in the horizontal plane, the loop rejects vertically polarized signals from all directions.
https://picasaweb.google.com/114032640816757126398/MultiTurnLoopAntenna
 
Demonstration of directional signal nulls of a shielded H-field loop antenna.
0:00 Signal is maximum with the loop antenna vertically oriented in the plane pointing toward the transmitter.
0:05 A signal null occurs with the antenna rotated 90° to the transmitter source.
0:09 Signal strength returns to maximum with the loop antenna plane rotated toward the transmitter.
0:14 When oriented in the horizontal plane, the loop rejects vertically polarized signals from all directions.
https://picasaweb.google.com/114032640816757126398/MultiTurnLoopAntenna
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Wanderley Lagreca's profile photo
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I've been asked to identify the application of this 144 mm diameter Loop "antenna". The non-ferrous 6 mm diameter hollow loop contains eight turns of insulated stranded wire. The RG-58A/U coaxial cable is terminated with a UG88/U BNC male connector.  Any ideas?
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Carl Brutananadilewski's profile photoRoger Cain's profile photoCarol F. Milazzo's profile photoMikele Mikelino's profile photo
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Communities
28 communities
Education
  • University of Puerto Rico School of Medicine, San Juan, PR
    Medicine
  • Fordham University, Bronx NY
    Biology
  • Regis High School, New York, NY
  • Coindre Hall, Huntington, NY
  • Sacred Heart Private School, Bronx, NY
Basic Information
Gender
Female
Story
Tagline
Amateur Radio Station KP4MD
Introduction

Amateur Radio Station KP4MD 
Member ARRL YLRL MARCO 
River City Amateur Radio Communications Society, Sacramento

Interests in Antenna Modeling, Propagation, Radiotelegraphy, Software Defined Radio, Digital Communication

Astronomy, History, Languages, Music, Amateur Pianist 

Pediatrician

Bragging rights
I am blessed with a loving husband, children and grandchildren!
Work
Occupation
Pediatrician
Employment
  • Amateur Radio Station KP4MD
    present
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Citrus Heights, CA
Previously
Omaha, NE - San Juan, PR - Bronx, NY