Ionic Antennas & BFO Coil
PCB1
L2= 18 cm x 11 cm BFO coil made of 12 or 15 turns,wire 0,25 mm. No Faraday Shield.
PCB2
L1= Big Aluminium Antenna 22 cm x 30 cm(ion detector 1)
L2=Small single turn,copper antenna 8cm x 4cm ,Ion detector 2(this one fixed in the wood box,behind the BFO coil).
Originally posted by detectoman
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L2= 18 cm x 11 cm BFO coil made of 12 or 15 turns,wire 0,25 mm. No Faraday Shield.
PCB2
L1= Big Aluminium Antenna 22 cm x 30 cm(ion detector 1)
L2=Small single turn,copper antenna 8cm x 4cm ,Ion detector 2(this one fixed in the wood box,behind the BFO coil).

... And this is 30 years old!!! Some similarities are just coincidences!!!


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