Just how stupid is Robby_H?
Without prejudice
In the public interest
Not content with defaming me (“----- knowing full well it was stolen---”) as regards the pictures of the  unprotected Gp extreme circuit board an allegation which I totally refute he now, I allege defames BW over the QED with statements like: “its a cheap and nasty copy of ML's  Ip”  and other allegations. Now if these allegations were tested in law then the onus is on Robby to prove them true beyond all reasonable doubt! As regard the QED this means that he must prove beyond all reasonable doubt that the latest rev of  the QED is “ is a cheap and nasty copy of ML's  Ip”etc He does not have any information whatsoever on the latest QED as regards its circuit layout, schematics or firmware so how could he prove his allegations? My GS5b works well with low resistance/low inductance coils so I suppose according to the patent parrot, Eric must be using ML's long Tc coil circuits!!! What a dill you are Robby!

Robby -H may be able to avoid answering the tough questions on a forum but he could not ignore a subpoena or answering questions under oath if sued for defamation!! In such matters he would be asked by an aggressive barrister to detail the source of his information or allegations which I allege  would open up a can of worms and  I allege could implicate other parties in the the obtaining of information without the knowledge or consent of BW ie theft of IP or industrial espionage!
Now I hope this answers the question from the flounders moron from daisy hill!
doug

RH of course is clearly wrong  when he says “----------As I said before, the coil TC is the inductance divided by the coil and cable resistance but the coil switching circuit TC is the inductance divided by the coil and cable resistance plus any additional resistance in the circuit including the switch resistance."
The circuit is never a pure LR circuit of course, its an LRC circuit!
Poor old Robby is not content with just  posting EM nonsense now he posts electronic nonsense as well! Back to motor mechanics for beginners for poor old Robby!
The fact that a Pi can use low inductance/low resistance coils cannot a priori  tell you if the detector uses short /medium/ or long Tc coil /circuit methods! This can only be definitively known from an intimate knowledge of the circuit and all its components and how it works!
doug