2017-08-25, 09:08
We don't need big antennas for the range 30-300km
I have made lots of antennas and they all work well.
Important - Self-resonance must be high.
First I made a "reference antenna" 160mm Ø, 1mm, 14turn
Then one for a 75mm standard plastic tube
A piece of brake pipe and a 48-turn transformer on a toroid
The top antenna is isolated from toroid and is also used as an E-Field antenna - Perhaps the third channel in the H-Field antenna could be for E-Field
/Richo
I have made lots of antennas and they all work well.
Important - Self-resonance must be high.
First I made a "reference antenna" 160mm Ø, 1mm, 14turn
Then one for a 75mm standard plastic tube
A piece of brake pipe and a 48-turn transformer on a toroid
The top antenna is isolated from toroid and is also used as an E-Field antenna - Perhaps the third channel in the H-Field antenna could be for E-Field
/Richo