DD coils and the SPP

[Reg]

Here is a little trick you can use with a DD coil. If you turn the GB back to where all iron gives a high tone, which is somewhere around 4 or less, and then use a DD coil, you will find that near surface iron can generate a low tone if it is big and close enough to the coil. This can help in areas where there is a lot of old can pieces since they often stay near the surface.

This iron signal inversion is only effective for a specific depth. Past that depth, which usually is target size related, the iron junk will begin to make a high tone just like small gold. So, if you get a low tone and then you raise the coil a few inches and that target becomes a high tone, you know it is iron junk.

Reg

 

[Roscoe]

Ridgerunner, Thanks for that info mate, i can't wait to give it a run on the beach. I will experiment with gb on and off.

Old hand, Thanks for that info on detech coils. I think that 8" dd is just the ticket i am after for parks etc. and its waterproof as well, which is a bonus.

Reg, I will have to experiment with the GB control and see first hand what your explaining. I watched a video posted by Zuke, i think the video was made by yourself? I would like to learn as much as i can about the SPP and any info like that is real good help. Well i can't wait to get this little machine in my hands and experiment with it.

 

[ronniecruisin]

Hi. All. Tried a coiltec 250mmDDPro elliptical on the SPP. The coil works in the air. ie. no problem sounding off to targets, but as soon as you try to put it near the ground it makes the high tone constant noise, and cannot be ground balanced. There is no spot on the dial between the high and low tone to achieve balance. It's as though the control does not turn far enough to find this sweet spot. The coil is the little Joey type. Light brown color. Any Ideas????? Regards... Ronnie.

 

[Guest]

What happens if you try it with GB off in the kids sand pit?

 

[ronniecruisin]

Hav'nt got a kids sand pit, but, turning GB off makes no difference.

 

[Guest]

It's not a Etrac DD coil?

 

[old hand]

Been out this morning trying different coils on spp12x7 nf ,14x7 nf fibre glass, 12 whites 10x5 ml dd ,14x9 nf dd, 10x5 nf 8 ml and 14x7 advantage the 2 dd coils just ground balanced All the monos were OK this was all done in the gold fields I used a shot gun pellet 22 case and a 22 lead . I will not be using dd coil on my spp regards john

 

[KarlS]

I got 2 DD coils, Commander 11" and 10x5. Both run quiter then White's 7.5" mono.
Karl

 

[Roscoe]

Ok, I have had this once before in a place, i found out that the ground was to benign to achieve a ground balance. It made high tone when approaching the ground, but just like at the beach i let it auto tune in and kept a constant coil height and it was fine. With my minelab 8" mono around my block (basalt soil) i have to stay on or under the preset gain, other wise it wont find that sweet spot either.

 

[ronniecruisin]

Coil used to work fine on ML SD2200D.

 

[Roscoe]

Old hand thanks for that, i have the 8" commander coil. How did you find that coil in relation to your NF coils on the SPP?

 

[Guest]

Sorry Ronnie iv got no answer for you as the few DD coils iv tried seem to work fine'

 

[ronniecruisin]

Thanks Zuke. It's a mates. He'll have to get something else.

 

[Guest]

One of the pins hasn't pushed up inside the plug has it?

 

[old hand]

Roscoe where I tested was in the bush at Amherst out of the 8 coils I tested the 8inch commander M/L was fine 14x7 nf advantage 10x5 nf old white one and the 12 round whites were very good stable and no hic cup if you under stand what I mean ,that's why I did the test . The whites is the one that surprised me I am going to get a skid plat for it next week and give it a good run regards john

 

[ronniecruisin]

Don't know Zuke. I'll check. Still works perfectly in air though. Run a target past it....Perfectly normal.

 

[ronniecruisin]

Checked the plug. All fine.

 

[Guest]

Like you said sounds like it just isn't in a GB range, strange tho as the minelab 5x10 DD works?

 

[stalker]

Might be a stupid question . How much charge were In the batteries .. The spp suxs the guts out Em pretty quick.. and some coils use more power than others ..

 

[old hand]

With the DD s I tried they were just in ground balance at 10 all coils are different