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A Receiving Loop for Long Waves
One major problem receiving long waves e.g. 137 kHz ham band is the presence of local noise sources
post 22 Mar 2024
Antenna Loop Links →
La antena de cuadro o Magnetic Loop
The first antenna of this type that I made, was something similar to a frame antenna similar to those used by the old AM radio
Loop 1.5-30 MHz with preamplifier
The range of 2.7 to 7.3 MHz. The variable tuning capacitor is a 3 recovery air cages on an old tube radio receiver
Loop Magnetica per i 144 mhz
Ideale per il mobile, radio cluster, beacon VHF
156
The first antenna of this type that I made, was something similar to a frame antenna similar to those used by the old AM radio
The range of 2.7 to 7.3 MHz. The variable tuning capacitor is a 3 recovery air cages on an old tube radio receiver
Ideale per il mobile, radio cluster, beacon VHF
Antenna switch arduino for icom IC-7300 A solution built around an arduino nano and one of the readily available four relay switching boards
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