Reverse Engenering: A TR/ Disc/ Geb To 2 box or BFO?

[JIMI]

This aught to spark som conversation, Input needed from all you folks on this, Lets get a real round table started.


Q: What if I took an existing proven unite, split and rewound the coils to a 2 box configeration? I know retunning would be in order to compensate for the change but the first problem would be the coupling capacitor between the transmit and recive coils.


Q#2 What if i increased the TX power to, say 1 or 2 watts and brought the sensitivity down to -.5 microvolt. What is the consensis of the group on the stability and still haveing full tunning control?


Q#3: What if it was done with a BFO unit to 2 box?


What I am looking for is Max Depth with sesitivity and posibly ground ballance.


"Howed you Guese" " Yes I am looking for something "DEEP"".


I know Carl will answere what about you others, Input please.


JIMI

[Carl]

Re: Reverse Engenering: A TR/ Disc/ Geb To 2 box or BFO?

>Q: What if I took an existing proven unite, split and rewound the coils to a 2 box configeration? I know retunning would be in order to compensate for the change but the first problem would be the coupling capacitor between the transmit and recive coils.


What do you mean by coupling capacitor? You probably don't need to mess up the original coil, but making the two-box coils match the characteristics of the original coil might be a challenge. I believe that a lot of detectors use feedback coils in the search loops.


>Q#2 What if i increased the TX power to, say 1 or 2 watts and brought the sensitivity down to -.5 microvolt. What is the consensis of the group on the stability and still haveing full tunning control?


What do you mean by -0.5uV? Increasing TX power does not give a proportional return in depth and probably makes coil balancing even more critical.


>Q#3: What if it was done with a BFO unit to 2 box?


Almost all BFOs have a single search coil. It is possible to place the reference coil outside like a two-box but I don't think it will buy you anything.


>What I am looking for is Max Depth with sesitivity and posibly ground ballance.


How about a large coil PI detector?


- Carl

[Piotr]

Re: Reverse Engenering: A TR/ Disc/ Geb To 2 box or BFO?

>>Q: What if I took an existing proven unite, split and rewound the coils to a 2 box configeration? I know retunning would be in order to compensate for the change but the first problem would be the coupling capacitor between the transmit and recive coils.


>What do you mean by coupling capacitor? You probably don't need to mess up the original coil, but making the two-box coils match the characteristics of the original coil might be a challenge. I believe that a lot of detectors use feedback coils in the search loops.


I think Carl response is adequate and comprehensive. I can only add that, in my opinion, it would be not so difficult to convert an ordinary commercially available MD into a two-box (provided it has no feedback coil - yet I do not know which detectors use it, maybe Fisher?). Stable mechanical construction would be the real challenge.


Piotr