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A 20-&-30-or-20-&-39-Meter Trap Antenna
Thatit would be fun and doable to design a 20 & 30 or 20 &39meter vertical antenna, featuringa coaxial trap to isolate the20-meter portion
post 30 Apr 2024
30 meter antenna Links →
End-fed half-wave antenna for the 7 or 10
end-fed half-wave antenna for the 7 or 10 mhz amateur bands for portable qrp
FLAT EH antenna band 10 MHZ
Much of the low band HF is full of clicks and other strange noises. I began to listen to 10 MHz and found lots of activity and interesting stuff to listen to. At that time I used a 42 metre long wire fed into an ICOM AT-180 tuner and my transceiver was an of ICOM-7000. Although I had not had many QSOs on this band I was intrigued and quickly decided to construct a quick and easy flat EH design, not the EH cylinder design
Force12 Sigma 143- 30 -40 meter dipole rotable
This was a very frustrating antenna to tune and install
22
end-fed half-wave antenna for the 7 or 10 mhz amateur bands for portable qrp
Much of the low band HF is full of clicks and other strange noises. I began to listen to 10 MHz and found lots of activity and interesting stuff to listen to. At that time I used a 42 metre long wire fed into an ICOM AT-180 tuner and my transceiver was an of ICOM-7000. Although I had not had many QSOs on this band I was intrigued and quickly decided to construct a quick and easy flat EH design, not the EH cylinder design
This was a very frustrating antenna to tune and install
Ferrite Shop Ferrite-shop on-line shop, cable clamps,toroids, cable cores, technic,ferrite material choice
Amateur radio kits by Kanga US
50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal