northwest The "Bismark" coil
Welcome, Guest. Please login or register.
Friday November 16 2018 01:37:45 AEDT AM
Home Help Login Register
News: Welcome to the Australianelectronicgoldprospectingforum founded in July 2010, an add free totally independent forum with over 70 boards and paid for and managed by the Admin.Total forum Topics: 9,052  Total forum Posts:44,942. Members:780 Total page views:12,001,347     Admin and  forum and domain name owner :marjen at optusnet.com.au. Guests can only see a limited number of boards at present and cannot see any hot links. Guest cannot post and never will be permitted too!Registration of new members must be approved by admin.Anyone known to have any past or present association with Codan/ML or acting on their behalf as a proxy or intermediary  will not have their registration approved.
All moderators from Prospecting Australia (PA) forum are banned. All  original Photos and posts and  original materials displayed on this site are COPYRIGHTED and remain the property of the poster and the  Austalian electronicgoldprospectingforum.com. All messages on this forum express the personal views of the author and should not be interpreted as necessarily being in accord with those of the forum owner and neither the owner of this forum and its domain name nor SMF or the forum software developers or the forum host shall be held responsible for the content of any message. Admin reserves the right to remove any offensive or objectionable posts. No defamatory material or politics/religion or issues of race will be permitted.
Unlike Prospecting Australia forum this forum is not run for the financial gain of the owner or admin. Unlike PA forum members here may link to or promote similar other forums without being banned by a group of unstable and inconsistent, faceless moderators/admin and an admin who resides overseas! Unlike  Prospecting Australia  forum this forum does not breach your privacy  by sharing your personal data with any  third party or advertiser unless directed /requested  by an order of the courts. Do you trust Google, Adsense or Amazon  with your personal data? Are you happy to have your personal details stored on an overseas server  and controlled by an  overseas unknown admin? By contrast this forum is hosted on an Australian server and the admin resides in Australia.Unlike  Prospecting Australia you do not have to make 10 posts before you can use the forums personal messaging system!
More QED instruction videos added and testing on  buried nuggets.
QED in WA
"Well two days of detecting in WA and I can report that the QED is performing very well and is handling the conditions without a problem" And is finding gold!
Why pay $200 /year ripoff to be a forum sponsor on Prospecting Australia forum with all the limitations and restrictions placed on you when you can advertise your products/services(except any Codan/ML products/services) here for FREE just by joining this forum!
The designer and manufacturer of the QED will only post on this forum!

australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils  |  Topic: The "Bismark" coil 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: The "Bismark" coil  (Read 658 times)
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« on: Thursday September 27 2018 12:33:46 AEST PM »

  
link-https://www.youtube.com/watch?time_continue=114&v=ND6dPRv1JnE
I wonder how it would run on the QED?
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« Reply #1 on: Friday September 28 2018 12:05:47 AEST PM »

  
  
link-https://www.youtube.com/watch?time_continue=114&v=ND6dPRv1JnE
I wonder how it would run on the QED?
doug smile

I wonder where the Bismark coil is now?
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #2 on: Friday September 28 2018 18:05:04 AEST PM »

Not sure Doug. Robyn sold/gave away a lot of Jim's gear.

Here's John Hider Smiths 36" flat wound in action which Reg Wilson now owns:

  
Logged
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« Reply #3 on: Friday September 28 2018 19:35:21 AEST PM »

  
Not sure Doug. Robyn sold/gave away a lot of Jim's gear.

Here's John Hider Smiths 36" flat wound in action which Reg Wilson now owns:

  

Did   John Hider Smith  make the coil?
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #4 on: Saturday September 29 2018 15:46:30 AEST PM »

Yes Doug. He had technical help with the winding from a friend whose name escapes me, and he did the glassing himself. I remember him demonstrating its robustness by driving over it with his ute, much to Jim Stewarts horror - - -
Reg now owns it and has run it on his kwed successfully.  smile
Logged
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« Reply #5 on: Tuesday October 16 2018 10:51:08 AEDT AM »

The Bismark in action.
  
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #6 on: Tuesday October 16 2018 11:24:02 AEDT AM »

Jim wound the "Bismarck" with a slightly higher than normal impedance, which meant it took awhile to stabilise when first switched on, but Jim theorised that this could have given it better than normal depth for a coil of this size.

Th "Bismarck" and the carrier I built for it now resides with Jims widow Robyn.
Logged
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« Reply #7 on: Tuesday October 16 2018 11:32:43 AEDT AM »

  
Jim wound the "Bismarck" with a slightly higher than normal impedance, which meant it took awhile to stabilise when first switched on, but Jim theorised that this could have given it better than normal depth for a coil of this size.

Th "Bismarck" and the carrier I built for it now resides with Jims widow Robyn.

Jim wound another 24" mono i believe?
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #8 on: Tuesday October 16 2018 15:08:37 AEDT PM »

Jimmy wound a lot of coils. Biggest I remember was a 48" mono but it was totally impractical. He had a number of coils in the 24" size, including some wound earlier for "Whites" detectors.
Bismarck was the only 36" mono he had for many years, but we modified a 36" DD which we had made to order by John Gladdis and John Kah at Coiltek, after a similar sized coil we made produced unimpressive performance (as did theirs)

Towards the end of his life Jimmy and Tony Honey made several experimental "concentric" coils as well as experimenting with Ground loops.
Tony has carried on with Jims coil making legacy and, working in communication with Rohan Johnson (Nuggetfinder) has made several large loops of many configurations. The most impressive are the concentrics, which blow monoloops out of the water on depth in extreme (or any) ground.
Logged
GARY
QED users
Junior Member
*
Offline Offline

Posts: 385


« Reply #9 on: Tuesday October 16 2018 16:20:16 AEDT PM »

  
The most impressive are the concentrics, which blow monoloops out of the water on depth in extreme (or any) ground.

I would agree on some results I have been privy too view using extreme timings.

Gary.
Logged

"The more you know, the more you know you don't know."
Doug
Administrator
Revered Supreme Hero Member
*******
Offline Offline

Posts: 16242



« Reply #10 on: Tuesday October 16 2018 22:13:12 AEDT PM »

 When i last met Jim he was winding up a large coaxial coplanar coil using litz wire. I wonder if he ever finished the coil before he got ill?
doug smile
Logged

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #11 on: Wednesday October 17 2018 08:06:26 AEDT AM »

That's the type I'm referring to.  smile

Tony and Jim worked closely together developing this type of coil and Tony has continued developing and refining them following Jims demise.
That particular coil was not a complete success but by altering the winding layout and inner/outer coil spacing ratios Tony has now several working coils of different diameters. Here's one:



We tested several at the Laanecoorie test site last year using different sized gold and, as I said, they have about 15-20% depth advantage over a similar sized flat wound monoloop. No extreme settings were used.

Tony has also considered non co-planar concentrics, or "Top Hat" configurations but is yet to produce a working prototype.
Logged
GARY
QED users
Junior Member
*
Offline Offline

Posts: 385


« Reply #12 on: Wednesday October 17 2018 10:49:54 AEDT AM »

What I call as an extreme setting is in Normal timing using a mono coil over high mineralised ground.
Logged

"The more you know, the more you know you don't know."
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #13 on: Friday October 19 2018 21:13:54 AEDT PM »

  
What I call as an extreme setting is in Normal timing using a mono coil over high mineralised ground.

Just back home from a Colonoscopy examination in Canberra. 

Hi Gary. My favourite Minelab extreme setting was using a big double "D" in "Sharp" It worked for me!  smile

 The advantage of the "concentric" type above is its unsurpassed ability to penetrate extremely hot ground. Tony relates how (in the west some years back) using a 5000 and jackhammer, he recovered a 14 oz colour buried deeply in solid ironstone.
This piece gave a good signal. He told me that no other coil he tried over it could hear anything. With just my short time testing them, I believe him.
 
 Because the coaxial co-planar layout has a deep, well focused but narrow conical field, it has maximum depth, but it is easy to miss targets without good overlap. Incidentally, Tony informs me that he has no need for a GPZ 7000.  smile

Logged
GARY
QED users
Junior Member
*
Offline Offline

Posts: 385


« Reply #14 on: Saturday November 3 2018 18:01:03 AEDT PM »

  

Just back home from a Colonoscopy examination in Canberra. 

Hi Gary. My favourite Minelab extreme setting was using a big double "D" in "Sharp" It worked for me!  smile

 The advantage of the "concentric" type above is its unsurpassed ability to penetrate extremely hot ground. Tony relates how (in the west some years back) using a 5000 and jackhammer, he recovered a 14 oz colour buried deeply in solid ironstone.
This piece gave a good signal. He told me that no other coil he tried over it could hear anything. With just my short time testing them, I believe him.
 
 Because the coaxial co-planar layout has a deep, well focused but narrow conical field, it has maximum depth, but it is easy to miss targets without good overlap. Incidentally, Tony informs me that he has no need for a GPZ 7000.  smile


G'day JRB, only just read your reply today since I've been away on a trip to Japan however good to be back in Oz.

Btw do you know what timing Tony was using on the 5000 with the "concentric" type coil to recover the 14ozer buried deep in ironstone?

Gary.
Logged

"The more you know, the more you know you don't know."
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #15 on: Saturday November 3 2018 18:39:38 AEDT PM »

Gary:

Don't recall the timing used. If you're ever near Laanecoorie, call in at the park for a chat with him.

I've known Tony for years. Jim Stewart and I were always impressed with the quantity of big gold he recovered from north west WA following up after cyclones.

Here's another shot (upside down sorry  smile)

Logged
bugwhiskers
invited members
Senior Hero Member
****
Offline Offline

Posts: 1970



« Reply #16 on: Sunday November 4 2018 15:23:22 AEDT PM »

The post below dates back to May 2012.
It's interesting to note that since then at least 2 parties have lodged patents that feature "constant current damping".


* CONSTANT_CURRENT_DAMPING.PNG (34.5 KB, 1267x314 - viewed 62 times.)
Logged

All posts are my opinion and are stated without prejudice and in the public and consumers interest.
jrbeatty
QED users
Newbie
*
Offline Offline

Posts: 77



« Reply #17 on: Sunday November 4 2018 15:44:06 AEDT PM »

Can't comment on the technical side personally since I haven't used ground loops but, once again, Jim and Tony were working on them when Jim died. Although depths obtained were super impressive, stability was unsatisfactory and Tony lacks the electronic knowledge to pursue the experiment any further:



We all know somebody here with the requisite knowledge to take the idea further - - -  happy face
Logged
bugwhiskers
invited members
Senior Hero Member
****
Offline Offline

Posts: 1970



« Reply #18 on: Sunday November 4 2018 16:48:28 AEDT PM »

IBgold, Muntari and Aziz have been making progress but obtaining the raw materials is difficult.
Logged

All posts are my opinion and are stated without prejudice and in the public and consumers interest.
IBGold
invited members
Junior Member
****
Offline Offline

Posts: 461


IBGold at home.


« Reply #19 on: Sunday November 4 2018 16:52:25 AEDT PM »

Hi I will attach some pictures of the six foot ground loop and TX unit that was designed about four years ago to be used with the QED as the driver and as the RX unit but went no further due to medical problems at the time and due now to my detecting partner and I being in our 70's not being able to dig the deep holes needed but if one of you wants to carry on with the project talk to me.

Regards, Ian. happy face


* Ground Loop TX 004.JPG (1803.38 KB, 2304x1728 - viewed 57 times.)

* Ground loop 006.JPG (594.98 KB, 2297x1121 - viewed 58 times.)
Logged

Regards, Ian.
Pages: [1] Go Up Print 
australian electronic gold prospecting forum.com  |  Detector Technology and Electronics and new detectors  |  Detector Coils  |  Topic: The "Bismark" coil « previous next »
Jump to:  


Login with username, password and session length

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2006-2009, Simple Machines
Simple Audio Video Embedder

BisdakworldClassic design by JV PACO-IN
Valid XHTML 1.0! Valid CSS!
gold