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#26

karelian65
Member
Joined: 16 January 2017
Posts: 57
Member
31 March 2017 01:32 pm

Other coils, medium and large were also ground tested at the same time. White's 12 mono, White's 12 Duelfield, Jimmy Sierra (Made by Miner John) Digger coil 14x8 mono, Detech 15x10 mono, Miner John 12 x 8 folded mono, Miner John 11x7 mono, Detech 11 x 6 mono. Same settings with Tdi Pro, gain 5, Frequency to the left, Pulse delay 10, ground balance between 8-9, conductivity ALL.

Only the White's 12 Duelfield had difficulties with the ground, it managed but was a little unstable and noisy whilst getting the job done..
1490926518_mediumcoils1.jpg

Digger 14x8 mono. 1 grain 2cm, 5c 28cm, 3 pence 19cm, 0.5g gold coin 16cm, 1/2 Sovereign 30cm, Penny 33cm, Buckle 53cm, US Quarter 27cm....

Detech 15x10 mono. 1 grain 2cm, 5c 29cm, 3 pence 18cm, 0.5g gold coin 18cm, 1/2 Sovereign 27cm, Penny 33cm, Buckle 54cm, Quarter 27cm....

White's 12 OZ mono, 1 grain 2cm, 5c 26cm, 3p 18cm, 0.5g gold coin 18cm, 1/2 Sovereign 26cm, Penny 28cm, Buckle 50cm, Quarter 27cm.........

White's Duelfield, 1 grain 3cm, 5c 26cm, 3pence 18cm, .5g gold coin 18cm, 1/2 Sovereign 26cm, Penny 28cm, Buckle 50cm, Quarter 27cm........

Miner John 12x8 Folded mono. 1 grain 3cm, 5c 25cm, 3p 20cm, .5 gold coin 15cm 1/2 Sov. 28cm, Penny 31cm, Buckle 47cm, Quarter 26cm.....

Miner John 11x7 mono, 1 grain 2cm, 5c 24cm, 3 p 17cm, 0.5 g gold coin 15cm, 1/2 Sov. 25cm, Penny 31 cm, Buckle 47cm, Quarter 26cm.....

Detech 11x6 mono, 1 grain 4cm, 5c 25cm, 3 p 18cm, 0.5g gold coin 18cm, 1/2 Sov. 28cm, Penny 29cm, Buckle 47cm, Quarter 26cm..........

The smaller coils seem to compare well with the larger ones, better on the small stuff and not far behind on the larger targets at depth.
Interesting.. end to my coil tests.

3 users like this post: Goldpick, Dogmatic, 7.62marksman

#27

karelian65
Member
Joined: 16 January 2017
Posts: 57
Member
01 April 2017 11:59 am

Posted results and Kerry aka 'mntnflyr4fun' has done a great job with a spreadsheet on findmall. Much more user friendly format..1491008019_file.jpg

Full credit to him, my results were a bit of a mess.. thumbsup

3 users like this post: PhaseTech, Dogmatic, 7.62marksman

#28

karelian65
Member
Joined: 16 January 2017
Posts: 57
Member
13 October 2017 01:35 pm

Just traded an old coil for a White's SuperPulse 220 mono coil. Pretty sure these were meant for the African market but White's USA go rid of them recently with a special sale. Just a few photographs so you can see what I'm on about. Same coil housing as Eclipse 950 etc..

Air tests as follows, White's Tdi Pro, ground balance OFF, conductivity ALL, gain on MAX, Frequency in middle using built in speaker. No EMI issues despite suburban setting etc. Quiet stable coil. Hits hard for about 80% of detected depth and tapers off for the last 20% of detected depth. This varies but is a rough estimate depending on the target. It is only an air test, real world ground tests will be different.

1 grain ingot 8cm, 5 cent coin 32cm, 3 pence 33cm, .5 gram gold coin 27cm, 1 penny 36cm, US Quarter 33cm, White's Buckle 62cm and finally a Half Sov. 36cm 1507861631_new1.jpg

All repeatable and clear signals, no whispers counted etc..1507861656_new2.jpg1507861673_new3.jpg1507861693_new4.jpg

I think these SuperPulse 220 coils were dumped by White's at US $40 each, our American friends got a good deal..

All the best,
Karelian

2 users like this post: Dogmatic, 7.62marksman

#29

karelian65
Member
Joined: 16 January 2017
Posts: 57
Member
06 December 2017 07:03 pm

The SuperPulse 220 was mounted on my Tdi Pro Oz and taken out into the goldfields. A few days out visiting areas around Wedderburn, Dunolly and Talbot. No problems with ground balance, performed well and seemed stable. A bit of gold would have been nice but it did find the usual trash and at good depths. Small bullet fragment, copper jacket found about eight inches in shallow rocky ground; all that excitement for nothing... Balances nicely on the end of the machine, no noise when bumped, waterproof, White's quality.. Looking forward to some beach time in the near future. Impression is it is a decent coil with good performance.1512547012_sp220a.jpg1512547033_sp220b.jpg1512547052_sp220c.jpg

I suspect it will be spending most of it's time on the Melbourne beaches this summer, but at least I know it can also handle hot ground and may be called upon to do some more prospecting in the future.

All the best,
Karelian

3 users like this post: 7.62marksman, grubstake, Goldpick

#30

karelian65
Member
Joined: 16 January 2017
Posts: 57
Member
16 December 2017 08:23 pm

I had the chance to borrow a Nugget Finder 14 x 7 mono, I've got it for a while so I took the opportunity for a useless air test.

1 grain ingot 7cm
5 cents 32cm
3 pence 33cm
.5 gold coin 28cm
1/2 Sov: 38cm
Penny 35cm
Buckle 59cm
US 25c 33cm

This coil on the Whites Tdi Pro likes a decent sweep speed for best performance as do some other 'larger' coils. It is long and thin at 14 x 7 and I'm looking forward to taking it into the goldfields to gain some more experience with it.1513415397_nf1.jpg1513415414_nf2.jpg1513415430_nf3.jpg

I really like the 8 x 6 Sadie a lot, so I'm looking forward to seeing how this compares. Much bigger footprint but balances nicely on the Pro...
Picked up more EMI in the suburbs than Miner John and Razorback, Detech 15 x 10 is quieter. deeper. Detech 11 x 6 seems to hit harder..deeper but it is early days. In the ground is what counts.

Given time I'll head out and do some prospecting and ground testing with this and the Super Pulse 220.

All the best,
Karelian

5 users like this post: grubstake, 7.62marksman, mbasko, Ridge Runner, Greglz86

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