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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: 8,946   Total forum Posts:43,065 Members:719 Total page views:11,023,726 Admin and  forum and domain name owner :marjen at 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  original Photos and posts and  original materials displayed on this site are COPYRIGHTED and remain the property of the poster and the  Austalian 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.
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HOT Topics!
The need for big deep gold detectors. Over 14,000 views and 37 pages!!! This forum has brought you the QED("the best value for money Pi on the market"!),now to bring you  better coils!I do NOT receive ANY direct or indirect pecuniary or ANY other benefits from the sale or promotion of the QED.Any such assertions are untrue and defamatory!!
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australian electronic gold prospecting  |  Recent Posts
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 on: Friday April 13 2018 12:39:53 AEST PM 
Started by Doug - Last post by Doug
Snow, Water, Ice and Permafrost in the Arctic
Summary for Policy-makers
doug smile

 on: Friday April 13 2018 11:31:17 AEST AM 
Started by Doug - Last post by Doug
doug smile

 on: Friday April 13 2018 11:10:41 AEST AM 
Started by Doug - Last post by Doug
Gold Fields of Victoria in 1862
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 on: Friday April 13 2018 00:57:40 AEST AM 
Started by Doug - Last post by WM6
Great infos.


 on: Thursday April 12 2018 22:22:35 AEST PM 
Started by Doug - Last post by Doug
Deep Bomb Detection

Gap EOD has developed the UltraTEM
doug smile

 on: Thursday April 12 2018 22:16:24 AEST PM 
Started by Doug - Last post by Doug
The Use of Sub-Audio Magnetics (SAM) in Gold Exploration
– Examples from the Yilgarn Craton, WA
John Jackson
doug smile

 on: Thursday April 12 2018 21:59:03 AEST PM 
Started by Doug - Last post by Doug
Aids To Survival is a Western Australia Police Academy publication initially written and
compiled by Sergeant Bert O’Meagher APM, Officer In Charge, Command & Land
Operations Unit at the Western Australia Police Academy in collaboration with First Class
Constable Dennis Reid and Dr Ross Harvey, M.B, B.S. D.Obst. R.C.O.G. A.C.C.A.M.
The Command & Land Operations Unit was introduced to provide members of the Western
Australia Police Service with the necessary knowledge and skills to carry out their duties in
outback Western Australia and to enable them to co-ordinate or participate in emergency
operations and advise on outback safety. In keeping with the WA Police Service mission to
provide a safer and more secure Western Australia the unit is concerned with the education of
interested community groups and individuals.
Originally the book was produced to provide members of the Western Australia Police
Service with a locally produced source of reference for use in training and for dissemination
to the public. To this end the book has proved to be extremely successful, this being the 24th
edition with over 430,000 copies being distributed since its introduction in 1979. It is now
available on the Internet under the WA Police Service website.
The book is required reading for several community groups, youth organisations, education
institutions and industry trainers throughout Western Australia. Contents have been provided
to Royal Flying Doctor Service WA] for inclusion in their publication, Safety & Survival
A dedicated group of community minded individuals and organisations have contributed
information and items over the years and their efforts and contributions are much appreciated.
Contributors include - Peter Bindon, Vern Delgado, Arthur Connor, Graham Brammer,
Ronele and Eric Gard, Richard Lushey, Ric Clifford, John Evans, The Duke of Edinburgh’s
Award [WA], The Royal Lifesaving Society [WA], St John Ambulance [WA], Red Cross
[WA], Bureau Of Meteorology [WA], Australian Communications Authority and Sergeant
Phil Ramsay [WA Police]. Diagrams were originally drawn by Western Australian
Government Print Artists and updated as required.
Staff at the Western Australia Police Academy Command & Land Operations Unit who have
contributed to the book include; Senior Constable Paul McKee, Senior Constable Ian
Thomson, Senior Constable David Stark, Senior Constable Douglas Fleetwood, Senior
Constable Glen Blackwell and Senior Constable Shaun Jackson.
Thanks are also extended to students of classes conducted by the Western Australia Police
Academy Command & Land Operations Unit and members of the community of Western
Australia who have provided valuable comment and feedback
doug smile

 on: Thursday April 12 2018 11:25:20 AEST AM 
Started by GARY - Last post by GARY
The discussion and build of the coil in "The need for big deep gold detectors" thread seems to be taking a long time to complete and to be eventually tested out in the field.

Using flat wound winding for both the separate Transmit and Receive coils instead of the normal bundle wound in concentric type coils, then it will be interesting to read of its results when it finally gets to be field tested.

A nuisance and difficulty that I have with the flat wound type coil is trying to pinpoint a target still in the ground compared to the bundle wound type coil, more so when the target is small in size as the sensitivity to that target is close to the inner windings. The bundle wound type coil allows you to tilt the coil more so edgewise for a more accurate pinpoint.

However as the target increases in size it allows you to pinpoint more towards the outside winding of the flat wound mono coil.

Not sure how much harder a flat wound concentric coil will be to pinpoint although I expect one would not be chasing small targets as the name of the thread mentioned above implies.

 on: Wednesday April 11 2018 16:37:45 AEST PM 
Started by GARY - Last post by Alex
Hi Gary.That was interesting. I posted a method I was going to try on this forum winding a double flat mono using mosaic mesh and am pleased to say made winding with litz a lot eaier .I haven't shielded it yet but I have a stacked momo 5x5 layeres which I will compare with.On a post by IB gold post 431 need for big deep gold detectors Are specs for a 12 inch evo coil at 510 kHz .I would have thought they would have a much higher resonate frequency.

 on: Wednesday April 11 2018 10:56:57 AEST AM 
Started by GARY - Last post by GARY
I have been following a discussion on Finders for some time now and a recent discussion got me thinking in regards to the flat wound type and the bundle wound type mono coils.

From what is being said between two members of the forum one appears to be saying a smaller diameter flat wound coil mono is capable of matching a larger diameter bundle wound mono whereas the other is saying the opposite that the flat wound coils are equivalent to a smaller bundle wound coils.

Therefore as is my addition with testing and since I have both a round 12" flat wound mono and a round 12" bundle wound mono I would run an air test between both coils with my QED using 5 nuggets, a 0.2 gram , 2 gram, 23 gram, 78 gram and 103 gram.

The result using the exact same settings showed both coils produced the same response and depth on the 3 larger nuggets with the flat wound producing the best response and depth on the 2 smaller nuggets.

Some food for thought I suppose although another air test result with a 3oz wire gold & quartz specimen that a member refers too in another thread on this forum it appears a smaller diameter flat wound mono (19") matched a larger diameter bundle wound (25") using a GPX in FG timing and then the 19" flat wound only fell short by 1" to the 25" bundle wound using Normal timing on the same specimen.

Now whether this result was due to the type of specimen nugget used in the air test and would the result be different if using a solid type 3oz nugget as I used for my test I cannot say. Although the GPX does seem to be more sensitive to the more solid type nuggets than the more porous prickly type nugget.

May have to test my GPX using both 12" type coils when next out on the goldfield as no hope while within city limits compared to the QED.

Also I would say as you increase the size of a nugget the 25" bundle wound coil would then increase more depth wise than the 19" flat wound.


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australian electronic gold prospecting  |  Recent Posts

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