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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
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Carol F. Milazzo

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N6GN's demonstration of power transfer over a 28AWG single wire Surface Wave Transmission Line http://www.sonic.net/~n6gn/
#VHF   #HamRadio  
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4nec2 model analysis and impedance measurements of the Cubex Quad Mosquito-6 432 MHz antenna.  This is the 430-440 MHz version.  http://www.cubex.com/uhf.htm
https://plus.google.com/u/0/photos/114032640816757126398/albums/6237321419621252161
The standing wave ratio is less than 2:1 over the 425 through 441 MHz frequency range with a minimum of 1.14:1 at 432.3 MHz.  2:1 SWR bandwidth is 16 MHz.
The 4nec2 model file is posted at:
http://www.qsl.net/kp4md/432-6quad-cubex.nec
#HamRadio   #UHF   #antenna
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Preston Clark's profile photoCarol F. Milazzo's profile photoSherri Hyde's profile photo
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let us know how it works when you use it the first time,
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KP4MD 144 MHz WSPR station in Citrus Heights, California was exclusively on vertical polarization (Arrow 146/440 J-pole antenna) from 13 DEC 2015 through 0300 UTC on 25 JAN 2016. Since that time, the WSPR station returned to horizontal polarization with two stacked halo antennas at comparable 20 foot height above ground.

An interesting comparison of WSPR spot reports demonstrates a preservation of polarization sense over the 133-136 km signal paths over the coastal mountain ranges between KP4MD and horizontally polarized N6GN and vertically polarized KJ6MKI, both in Santa Rosa, California. 
On the other hand, the KP4MD-KI6STW and KP4MD-N6KOG paths showed much overlap between the two data sets, and there were insufficient data from paths to other study group stations to deduce a comparison.      
https://groups.google.com/forum/#!topic/2-meter-wspr/SVoJAdG4WGw 
#VHF   #HamRadio   #RadioPropagation  
 
KP4MD 144 MHz WSPR station in Citrus Heights, California was exclusively on vertical polarization (Arrow 146/440 J-pole antenna) from 13 DEC 2015 through 0300 UTC on 25 JAN 2016. Since that time, the WSPR station returned to horizontal polarization with two stacked halo antennas at comparable 20 foot height above ground.

An interesting comparison of WSPR spot reports demonstrates a preservation of polarization sense over the 133-136 km signal paths over the coastal mountain ranges between KP4MD and horizontally polarized N6GN and vertically polarized KJ6MKI, both in Santa Rosa, California. 
On the other hand, the KP4MD-KI6STW and KP4MD-N6KOG paths showed much overlap between the two data sets, and there were insufficient data from paths to other study group stations to deduce a comparison.      
https://groups.google.com/forum/#!topic/2-meter-wspr/SVoJAdG4WGw
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Carol F. Milazzo

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KP4MD 144 MHz WSPR station in Citrus Heights, California was exclusively on vertical polarization (Arrow 146/440 J-pole antenna) from 13 DEC 2015 through 0300 UTC on 25 JAN 2016. Since that time, the WSPR station returned to horizontal polarization with two stacked halo antennas at comparable 20 foot height above ground.

An interesting comparison of WSPR spot reports demonstrates a preservation of polarization sense over the 133-136 km signal paths over the coastal mountain ranges between KP4MD and horizontally polarized N6GN and vertically polarized KJ6MKI, both in Santa Rosa, California. 
#VHF   #propagation   #HamRadio  
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January 16, 2016 - Amateur Radio Demonstration at Northern California Ronald McDonald House Kids Day in Sacramento, California. Participants: ARRL SV Section Youth Coordinator Duane Wyatt WAØMJD, ARRL SV Section Manager Carol Milazzo KP4MD, Paul Grose N6DRY, Dwane Evans KG6KPW, Roger Cain KI6FYF, Paul McIntyre KC5JAX, Hunter McIntyre. The demonstration included CW contacts and phone contacts in the North American QSO Party on 20 meters and 2 meter packet radio traffic sent via WinLink. #ARRL   #HamRadio  
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Our February 2 - 7:30 pm Meeting Program
A Virtual Tour of the N6NA Repeater System with Chris Huber N6ICW
http://www.n6na.org/repeater
- Visitors are Always Welcome!
Sacramento County Corp. Yard, 5026 Don Julio Blvd
(corner of Elkhorn Blvd) Sacramento, California 95842
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Carol F. Milazzo

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Initial observation on terrestrial propagation with my new Cubex Quad Mosquito-6 70 cm antenna.
#HamRadio   #UHF   #antenna  
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Carol F. Milazzo

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4nec2 model analysis and impedance measurements of the Cubex Quad Mosquito-6 432 MHz antenna.  
Note: Cubex has two versions of this antenna. One covers 430-440 MHz and the other covers 440-450 MHz.  This is the 430-440 MHz version.  http://www.cubex.com/uhf.htm
Photos and data at: https://plus.google.com/u/0/photos/114032640816757126398/albums/6237321419621252161
The standing wave ratio is less than 2:1 over the 425 through 441 MHz frequency range with a minimum of 1.14:1 at 432.3 MHz.  2:1 SWR bandwidth is 16 MHz.
The 4nec2 model file is posted at:
http://www.qsl.net/kp4md/432-6quad-cubex.nec
#HamRadio   #UHF   #antenna
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Rodney Hill's profile photoCarol F. Milazzo's profile photoJeff Davis (KE9V)'s profile photoNicholas M's profile photo
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+Rodney Hill 432.300000 MHz is the 70 cm WSPR dial frequency
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Carol F. Milazzo

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KP4MD 144 MHz WSPR station in Citrus Heights, California was exclusively on vertical polarization (Arrow 146/440 J-pole antenna) from 13 DEC 2015 through 0300 UTC on 25 JAN 2016. Since that time, the WSPR station returned to horizontal polarization with two stacked halo antennas at comparable 20 foot height above ground.

An interesting comparison of WSPR spot reports demonstrates a preservation of polarization sense over the 133-136 km signal paths over the coastal mountain ranges between KP4MD and horizontally polarized N6GN and vertically polarized KJ6MKI, both in Santa Rosa, California. 
On the other hand, the KP4MD-KI6STW and KP4MD-N6KOG paths showed much overlap between the two data sets, and there were insufficient data from paths to other study group stations to deduce a comparison.      
https://groups.google.com/forum/#!topic/2-meter-wspr/SVoJAdG4WGw
#VHF    #HamRadio   #RadioPropagation  
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Durable weather shields can be made from weather resistant black vinyl end caps to protect antenna feed points from rain and the elements. 
http://www.tapplastics.com/product/plastics/plastic_rods_tubes_shapes/vinyl_caps/586
#HamRadio   #antenna  
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Carol F. Milazzo

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January 16, 2016 - Amateur Radio Demonstration at Northern California Ronald McDonald House Kids Day in Sacramento, California. Participants: ARRL SV Section Youth Coordinator Duane Wyatt WAØMJD, ARRL SV Section Manager Carol Milazzo KP4MD, ARES District 3 Emergency Coordinator Greg Kruckewitt KG6SJT, Paul Grose N6DRY, Dwane Evans KG6KPW, Roger Cain KI6FYF, Paul McIntyre KC5JAX, Hunter McIntyre. The demonstration included CW contacts and phone contacts in the North American QSO Party on 20 meters and 2 meter packet radio traffic sent via WinLink. #ARRL   #HamRadio  
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Carol F. Milazzo

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Unboxing the Cubex Quad Mosquito-6 Antenna.
The Cubex Quad web site http://www.cubex.com/uhf.htm states "Range 430-440, 440-450 MHz and Bandwidth>10MHz 2:1 SWR" but is confusing in not clearly explaining that there are two versions of this antenna.  
Cubex wrote: "We have two ranges...Range 1 is 440-450 MHz for USA sales and Range 2 is 430-440 MHz for European sales.  ...after looking at it (again) the range labeling can easily be misunderstood."
The SWR may be excessively high If one intends to use the Range 1 version on 432 MHz.  The instruction manual provides no information other than disparate SWR curves for each range.  I have recommended that Cubex indicate the frequency range of the antenna to avoid this confusion.
4nec2 model analysis and impedance measurements are posted at https://plus.google.com/u/0/photos/114032640816757126398/albums/6237321419621252161
The 4nec2 model file is posted at:
http://www.qsl.net/kp4md/432-6quad-cubex.nec
#HamRadio   #UHF   #antenna  
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Preston Clark's profile photoCarol F. Milazzo's profile photo
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+Preston Clark The 4nec2 model analysis and impedance measurements are now posted at https://plus.google.com/u/0/photos/114032640816757126398/albums/6237321419621252161
The 4nec2 model file is posted at:
http://www.qsl.net/kp4md/432-6quad-cubex.nec
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People
Have her in circles
1,187 people
Daniele “IZ8PPH” Occhiuzzi's profile photo
Jim Sky's profile photo
moustapha diop's profile photo
Starsky Pelegrino's profile photo
James Amyx's profile photo
Re Lallo's profile photo
Wulf Gar's profile photo
Brian Scott's profile photo
cristina hlcam's profile photo
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