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Portable HF Transmitting Loop Antenna
Except for the coupling loop, which is made from RG-58 coax, the entire antenna is made from hardware store parts
post 23 Mar 2024
Antenna Loop Links →
160mt riceiving loop antenna
Tune C1/C3 until impedance at connector is resistive at 1830
80/160m Small Receiving Loop
A small receiving loop helped; it has very deep nulls and made listening on 80 and 160 more pleasant
80m Frame Antenna
Cut the tubing into 900mm long pipes and drill 5 wire guides 3mm dia through it see drawing
A Crossed Field Loop Antenna for 3.5
This antenna is the latest form of CrossedField Antenna.The electromagnetic wavesare created within the small FieldInteraction Zone around the two
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Tune C1/C3 until impedance at connector is resistive at 1830
A small receiving loop helped; it has very deep nulls and made listening on 80 and 160 more pleasant
Cut the tubing into 900mm long pipes and drill 5 wire guides 3mm dia through it see drawing
This antenna is the latest form of CrossedField Antenna.The electromagnetic wavesare created within the small FieldInteraction Zone around the two
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