VLF RX 2016

Description

At the Christmas time 2015 I wanted once again in the VLF area receive the SAQ. This was very difficult because the man made noise in this frequency range have increased very much. I also wanted to use a small portable antenna. So I experimented with different ferrite antennas and windings and shielding. A very inexpensive antenna with threaded ferrite cores worked quite well in short-circuit operation in the VLF range.

In simulations, I had already designed different preamplifiers. The amplifier with the LT1028 was best suited. The signal is then transmitted symmetrically via a CAT6 cable between the preamplifier and the actual receiver. As drivers and receivers are the DRV134 and the INA134 inserted. I could then receive SAQ with the ferriteantenne at a computer in the house quite well. This is remarkable. Further experiments will follow...

Development of a new VLF ferrite antenna

Wooden sticks	Ferrite cores	Test Ant#1 a	Test Ant#1 b
Test Ant#1 c	Test Ant#1 data	VLF Ant #2	Ant#2 cores
Ant#2 windig tech	Ant#2 2x250t	Ant#2 shield	Antenna #2
0-1 MHz	0-30 kHz	0-5 kHz	0-1 kHz
Antenna #2