Recycling TX power

[Tepco]

First thing first,schematics:

http://www.4shared.com/document/KOm3zoCC/fisherpuls.html

[Tinkerer]

As you can see on the attached patent, 14 years ago the great metal detector designer Dave Johnson, invented a metal detector that recycled the TX power.

Technology has advanced a lot since then.

Can we, the "Consolidated Brain Power" of the forum improve on that design?

Are we capable of making use of the technological advances and design a detector that recycles the TX power and gives greater depth and sensitivity?

We might want to analyze first the patented design. Define it's advantages and it's shortcomings.

Was this design a commercial success? Why? or Why not?

Tinkerer