“After I became a licensed amateur radio operator in August of 1995, I received a QST magazine which had an article that explained it was possible with the right antenna, the Quadrifilar Helix antenna (QHA), to receive the 137 MHz weather satellite transmissions. The article that I read (1) was by an amateur by the name of Buck Ruperto (2), who one year later wrote another terrific article about a program called WxSat (3), that decodes the satellite transmissions (4). After several e-mails back and forth with Buck, I decided to build it. The antenna had fairly good coverage however it was tough to tune and didn’t resonate at the optimum 137 MHz. The received pictures were good however they displayed several deep nulls that always appeared at the same place on the files. I can’t lay the blame on Buck; his design was good it was just tough to replicate.
Over the next year I worked hard to find other outlets for antennas and discovered a web-site (5) that offered plans for a QHA that seemed easier to build. The elements were fashioned from 3/8 soft copper and had known dimensions. After studying the bill of materials and spending ½ a day scrounging for parts, the antenna went together in about 2 ½ hours. The first pictures that I received displayed marked improvement and I have subsequently built a 2nd QHA for another WxSat enthusiast here in central Florida……”
Read Full Article:
Product Features and use: · Electronic keyer paddles using electrostatic touch paddle technology · Because there are no moving par... Read more
HDSDR is a freeware Software Defined Radio (SDR) program for Microsoft Windows 2000/XP/Vista/7/8/8.1/10. Typical applications are Radio listening, Ham... Read more
NEWINGTON, Conn., Sept. 14, 2016 /PRNewswire-USNewswire/ — ARRL, the National Association for Amateur Radio, expressed its appreciation to membe... Read more
A retired radio enthusiast from Herne Bay has vowed continue his battle to install an aerial mast in his back garden even though he has been denied pe... Read more
Amateur Radio operators have relied on the RF-PRO-1B Active Magnetic Loop Antenna for decades. Now, it is manufactured and sold exclusively by DX Engi... Read more
RigExpert Stick 60kHz – 35MHz Analyzer | State-of-the-Art Antenna & Cable Analyzer Key Features: Frequency range: 0.06 to 35 MHz, upgradable... Read more
Radio amateurs once were the target of interference complaints filed with the FCC. Now, the FCC has made it easier for hams to file their own RF inter... Read more
Man Behind Morse Code Beginning in 1836, Samuel F. B. Morse and Alfred Vail developed an electric telegraph, which sent pulses of electrical current t... Read more
Today our friend EA4AK published some new photos at the fair FHN in Germany of new products Acom , is tuned for more updates throughout the day Read more
LAVERNOCK beach hosted an historical recreation of the first wireless transmission by Guglielmo Marconi which was sent from Flatholm Island to Laverno... Read more
Recent Posts
CW TOUCH PADDLES
HDSDR publishes a new Beta release
ARRL Thanks House Members for Passage of the Amateur Radio Parity Act
M0PAN – Radio fanatic vows to erect 30ft mast even though neighbours say it affects their pacemakers
The InLogis/Pixel Active Magnetic Loop Antenna Now Available Exclusively at DX Engineering
RigExpert Stick 60kHz – 35MHz Analyzer
Redesigned FCC Website Makes it Easy for Hams to File Interference Complaints
Man Behind Morse Code
New Acom Remote Contro AR 400 at FHN HamFest
First Wireless transmission marked with recreation
There are no ads, please add some
Warning: file_get_contents(https://plusone.google.com/_/+1/fastbutton?url=https%3A%2F%2Fqrznow.com%2Fa-quadrifilar-helix-antenna-for-137-mhz-by-kf4cpj%2F): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in /home/qrznow/public_html/wp-content/themes/goodnews5/framework/functions/posts_share.php on line 151
