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Coax loop antennas for 160 - 10 meters HF bands
Lacking room for a beverage receiving antenna, we constructed several loop receiving antenna to see if we could find a suitable low /lower noise receiving antenna
post 16 May 2024
Antenna Shortwave Links →
Shortwave Antennas Loop
Here are some photos of the Shortwave Loop Antenna assembly to help you with putting it together
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
The Carpet Loop A High Performance Indoor SW Antenna
Active antennas are expensive, apt to generate as much noise as signal, and are prone to overload
Two Tube Doerle
This radio uses two #30 tubes and operates on batteries. It has shortwave coverage in two bands, 4.8 to 7.5 MHz and 7.3 to 12.0 MHz using plug in coils
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Here are some photos of the Shortwave Loop Antenna assembly to help you with putting it together
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
Active antennas are expensive, apt to generate as much noise as signal, and are prone to overload
This radio uses two #30 tubes and operates on batteries. It has shortwave coverage in two bands, 4.8 to 7.5 MHz and 7.3 to 12.0 MHz using plug in coils
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