More power?

[Jason]

If the electro-magnetic field created by a detector is induced by voltage/amps, would it be possible to use a larger power supply, along with higher capacitant components, to induce a larger field for greater depth penetration and sensitivity?

[bbsailor]

Re: More power?

For pulse induction detectors, the short answer is yes. But there is a large however.

To double the depth however, takes approximately 64 times more power. Then there is the speed of pulse delay sampling when the large transmit pules is damped enough to begin the receive sampling. More power means a longer time to sample.

Sensitivity is based on several factors. What are you looking for? Gold jewlerly requires quick sampling (short delay time in about the 10uS range) due to the lower conductivity compared to other metals. If you are looking for large metal sunken ships you use high power and longer delays in the ms range.

Eric Foster makes a good high power unit that workes down in the 10uS range and would be good on the ocean beach. Do a forum search on his name for more good technical information about PI detectors.

bbsailor

[jackdetect]

Re: More power?

Maybe the better way to increasing dept is to increase dimensions of Tx coil, because of geometry of EM field. But also will have a problem with speed of pulses.

In VLF detectors is almost impossible to increasing the TX power in large number, because of geometry of standard balanced coil. With more power in Tx, you will lose balance (permeation of Rx).

Jackdetect.