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Skywire Loop Antenna
Below is a rough diagram and some photos of my skywire horizontal loop antenna. It is roughly 475 feet long and fed with 450-ohm ladder line
post 10 Mar 2024
Antenna Shortwave Links →
Echelon-Log Beverages
Two Beverages are paralleled a short distance apart, and stepped one in front of the other, can be phased to remove unwanted rearward response
Experimental Short-wave
These circuits perform very well. However, I'm still experimenting
Ferrite coupler
This is a useful device for coupling an external antenna to a radio that has no antenna jack
Flag Pennant Ewe
These antennas work best when propagation time of signals along the horizontal wires matches propagation time of the wave in space around the antenna, and when the earth or a ground system below the antenna is good
Harmonically Related Antenna Broadcast Bands
These two pages describe the assembly and parts measurement of a 1/4 wavelength, end fed receivin
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Two Beverages are paralleled a short distance apart, and stepped one in front of the other, can be phased to remove unwanted rearward response
These circuits perform very well. However, I'm still experimenting
This is a useful device for coupling an external antenna to a radio that has no antenna jack
These antennas work best when propagation time of signals along the horizontal wires matches propagation time of the wave in space around the antenna, and when the earth or a ground system below the antenna is good
These two pages describe the assembly and parts measurement of a 1/4 wavelength, end fed receivin
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground