Need diagram and parts list for auto tune circuit

[Pennyweight]

Hi everyone,
does anyone have a basic design and parts list for an auto tune circuit? I am trying to convert 'no-motion' all metal pinpoint modes on VLF motion discriminator detectors into a true all metal mode. All of the models I am working on have manual ground balance already. Cheers & Happy New Year!

[jimmyjiver]

Maybe!!!!!!!!!!

Hi, Check The Schematic Section OLDER METAL DETECTOR PATENTS SCHEMATICS....Maybe Something There You Can Use......Thanks