: The authors cover a wide range of detector types, including: BFO (Beat Frequency Oscillator).
This article was compiled from the collective technical memory of the DIY metal detecting community. No specific PDF was reproduced here, but the knowledge contained within those documents permeates the text. : The authors cover a wide range of
The schematic is drawn in classic, hand-routed PCB style, complete with part numbers (LF353 op-amps, IRF740 MOSFETs) that are still available today. hand-routed PCB style
Detailed comparison of coil types and construction techniques for building your own search heads. complete with part numbers (LF353 op-amps
Projects for GEB-discriminators and VLF-discrimination circuits.