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Surf PI Dual Field - Test Run Gets Gold

bdahunter

New member
I brought my Surf Pi Dual Field back to Bermuda from Canada last week and this weekend I got it out for some preliminary trials in Bermuda waters. The first thing I noticed about the DF was the big coil but the light weight compared to my Excal 1000, this new machine swings like a feather compared to the Excal. The light 12" coil was a real treat in the wet sand and ankle deep water but once I got out to knee deep and deeper the lightness was a negative feature because the 'neutral' bouyancy coil is actually a 'positive' bouyancy coil. The stock S shaft made it difficult to keep the floating coil firmly on the bottom, especially when there were irregularities in the bottom. A weighted sock full of sand would cure this but I'm thinking about other options that won't increase drag underwater as this coil likes to swing fast, I'll let everyone know when I brainstorm a better solution.



On Saturday evening I took the DF to my beach to familiarize myself with it as I know this beach inside and out, plus I've pounded it into submission with the Excal 1000 for the last 2 years and it rarely produces anymore; if the DF could find targets here then it would be a significant improvement over the Excal. I only managed 3 targets in 1 hour in the water with the DF using standard settings. The targets were a fishing weight (12"), a heavily encrusted spark plug (8") and an old iron ship's spike (over 18" deep), not exceptional but the odds were stacked against the DF on my hunted out beach and it was only a 1 hour trial.



This morning I caught a late Surf Church at Horseshoe Bay, this beach was heavily sanded in by Bertha a couple of months ago and has produce very little since then. I had a new plan for this morning's hunt and set the Gain at Max to the stop, the Delay I left at zero or off and the Threshold was barely audible. In the wet sand the DF gave a little chatter but had no problem sourcing bottle caps and pull tabs over 18" deep (this is the nut on the left of the picture, my beach nut is on the right). I'm going to have to get a better feel for ferrous vs. non-ferrous or I'm going to have much bigger biceps. After almost an hour of heavy digging in the wet sand to knee deep water I decided to try going to the Mine and the DF started to squeal as the big swells would roll past. It was very tricky keeping the coil on the bottom without any extra weight on the coil, as the salt water pulled past the bottom of the coil it would let out a squeal with each wave. I found a little shelter from the 3' - 4' swell behind some rocks and the DF quieted right down. Almost immediately I got a solid tone without any of the scrathiness that seems to define ferrous targets, 3 x 12" scoopfuls later I had a 10k white gold band in my scoop which was also the only target I came across in the Mine. Having cooled off in the Mine and seeing that the lifeguards were starting to straggle in I bailed out of the surf and called the trial a success.



I found a few more ferrous than normal but not an awful lot more, as I learn the ferous tone better this should decrease significantly, especially on deep targets. Running the DF flat out in the low mineralization of Bermuda wasn't a big problem so I think it's a winner and will only get better when I outfit it with a straight shaft and some weighting.

Cheers,

BDA
 
After you learn the sounds you will dig less low conductive trash and more gold than with the Mine lab. Just my experience.
 
BDA, Thanks for the time on reading this. I am posting this question many months after your post. I am using an EXCAL here in Hawaii. Some of the same problems I have is with the waves and the unit making noise. I deal with altos of unrealized rocks and soil here. I would like to here from you about your finale opinion you came to on your test trails and your opinion of the Dual FREQ P.I. I am thinking about adding the P.I. to my tools for use here as a back up or primary unit.Aloha,BOB
 
Hi BDA,

Glad to hear the SPDF is working for you. Just a thought. White's makes a closed scuff cover for the Super 12 coil that should work on the SPDF. Part # is 501-4128-1. Was thinking you could snap this on the coil then fill the gaps to weight the coil.

501-4128-1-b.jpg


Steve Herschbach
 
Kewl idea, Steve. I've gotten used to pushing the coil down to the bottom but eventually I'm going to have to do something about scuffing the coil.

Cheers Mate,

BDA:cool:
 
bdahunter said:
Kewl idea, Steve. I've gotten used to pushing the coil down to the bottom but eventually I'm going to have to do something about scuffing the coil.

Cheers Mate,

BDA:cool:

Me too (regarding scuffing the coil), what would be the best option for this? I was thinking of using "liquid nail" or tracing out something plastic and gapping it with waterproof sealer... another option that might work is to paint the coil with something tough and a different colour, so that you can see when it needs a re-coat, I think most used epoxy?

Also, with regards to holding the coil down because of buoyancy, I was having the same problem and I thought about filling the lower shaft with something heavy that the coil won't have to ground balance out. So be carefull if you use a bag of sand or something like that, make sure it's not highly mineralised or you'll lose performance! Redwood perhaps?
 
Well I use the SMDF with the coil position reversed. It feels like there is less weight on land since the SMDF is better balanced now. By reversing the coil, you shift the center of balance towards you. And it is easier to swing in the water. Hunting the wet sand going into the waves is better since the coil will not flop up now. The only negative is reversing the coil is that you cover a few less inches of ground per swipe. Using the coil backwards on my SMDF has pretty much eliminated the need for a coil stabilizer. I can not find any reason now to have the coil in the normal position.
 
you might try some wax paper under the coil and filling the space with a sand/epox mix to weight it some?then peel the wax paper off?
 
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