Barry K3EUI
@K3EUIbarry
West Chester PA
Joined
Intro
I am a retired Physics teacher/professor having spent most of my adult life teaching high school (Westtown School, a coed Quaker boarding school near Philly) and college/university (Northern Arizona University, West Chester University, Bryn Mawr College).
My younger adult life was training as an Astronomer.
My intro began at Swarthmore College and Sproul Observatory (1967) where I learned about binary stars and parallax and astrometry. One of the fascinating topics was to learn about the orbital motion of the ‘barycenter of a double star’ (my first name is Barry). So that fascination became my Master’s Thesis: Orbital Motion of the Photocenter of a Binary Star about the Barycenter. It was fun and in less than one year, I changed the way mass ratios of nearby stars are determined via photographic astrometry. This was done with a 24 inch refractor (lens) telescope and 5 x 7 inch glass photographic plates - the OLD DAYS.
My next stint as a graduate student was at University of Arizona (Kitt Peak Observatory) in Tucson AZ where I learned from the best instructors in the world, but I changed my mind after one year of research and decided to try teaching high school science - my real passion. But during those early years I managed to work at Lowell Observatory and U.S.Naval Observatory in Flagstaff Arizona, and a summer at Greenwich Observatory in England.
For the next 41 years (1970-2011) and 41000 lab reports later I was a high school science teacher: physics/math/astronomy and some electronics and music. After retiring in 2011, I have spent more time relearning aspects of Ham Radio, including VNA technology.
Ham radio has always been a passion - ever since I was 12 yr old and got a Novice license: KN3EUI in 1958.
Antennas and Sound Card digital modes are still fascinating.
That’s about it.
de k3eui
My younger adult life was training as an Astronomer.
My intro began at Swarthmore College and Sproul Observatory (1967) where I learned about binary stars and parallax and astrometry. One of the fascinating topics was to learn about the orbital motion of the ‘barycenter of a double star’ (my first name is Barry). So that fascination became my Master’s Thesis: Orbital Motion of the Photocenter of a Binary Star about the Barycenter. It was fun and in less than one year, I changed the way mass ratios of nearby stars are determined via photographic astrometry. This was done with a 24 inch refractor (lens) telescope and 5 x 7 inch glass photographic plates - the OLD DAYS.
My next stint as a graduate student was at University of Arizona (Kitt Peak Observatory) in Tucson AZ where I learned from the best instructors in the world, but I changed my mind after one year of research and decided to try teaching high school science - my real passion. But during those early years I managed to work at Lowell Observatory and U.S.Naval Observatory in Flagstaff Arizona, and a summer at Greenwich Observatory in England.
For the next 41 years (1970-2011) and 41000 lab reports later I was a high school science teacher: physics/math/astronomy and some electronics and music. After retiring in 2011, I have spent more time relearning aspects of Ham Radio, including VNA technology.
Ham radio has always been a passion - ever since I was 12 yr old and got a Novice license: KN3EUI in 1958.
Antennas and Sound Card digital modes are still fascinating.
That’s about it.
de k3eui
Відхилити повідомлення
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140 ft end fed looks decent on 3 lower hf bands for digi
I have no explanation for why the 140 ft "end-fed" with MyAntenna 49:1 UNUN has a dip on the 160m band. I've never operated on 160m, but I won't complain if the antenna works there. But I know it is 1
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Barry K3EUI
· #37554
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140 ft end fed looks decent on 3 lower hf bands for digi
* * * * *latest update de k3eui Barry END-FED wire extension to 140 feet* * * *new QTH: Kennett Square PA (SW of Phila)* * * *I waited for a cooler day to extend my 70 ft end-fed (worked well on 40/20
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Barry K3EUI
· #37544
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added a second radial to 18 ft vertical
* * *My goal: build a simple _inexpensive_ vertical for LOW-angle take-off for the 30m thru 10m bands* *(I already have a 40m NVIS low horizontal wire for NBEMS nets) * * * *I began with a 30 yr old C
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Barry K3EUI
· #37536
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novel six band vertical antenna de k3eui
*I have been struggling to get HF antennas at Crosslands (Kennett Square) due to the constraints here (like at most communities).* *I have an end-fed 60 ft wire low to ground for NVIS that is working
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Barry K3EUI
· #37530
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