J.W.Fisher Experience

[Anonymous]

Hello all PI Forum folks. I've been lurking here on and off for a while, but I haven't read all the old posts-- so excuse me if this has been discussed.
This Missouri snow/ice has kept me in the house too long and I've been thinking too much (dangerous for me). I would like to look for larger objects in shallow streams by attaching one of 40" coils to the bottom of my fiberglass canoe or tow the coil.
The only choices seem to be the J.W.Fisher Pulse 8X with towable coil or something like the Pulse Star with 40"x40" coil. The Pulse Star is too pricey. Does anybody have any experience with the J.W.Fisher units?
I have a Fisher Impulse, so I understand some about PI. I also use a Minelab Explorer 5", 10.5", and 15" coils. I also have (but don't use much) a White's 5900 with 3,6,8,9.5,15" coils.
HH,
Noble

 

[Anonymous]

Hi Noble,
An alternative is to use a Deepstar modified to run with a 40in square coil. I did one previously for a customer who wanted it for cache hunting and it worked fine.
Eric.

 

[Anonymous]

Why can't you use just about any PI detector with a super large coil? What needs to be changed... damping resistor? More 'on' current? Sample delay?

 

[Anonymous]

Hi Carl,
You could, but, large coils pick up more noise so it is of great benefit to increase the transmitter current to improve the signal/noise ratio.
Eric.