Finished 21 Inch Coil

[Charles (NY)]

I just finished up the 21 inch coil tonight, works pretty good in my front yard and I'm going to test it tomorrow at a field that is legendary for deep old coins.

[Sean Goddard]

Re: Finished 21 Inch Coil

WOW AWESOME..

Can I have one and how much is it?

Can I be your SOLE UK distributor please? I can sell bucketloads of these in the UK!!

Email by visiting the link below.



Pulsar Electronics

[Beachcomber]

Re: Finished 21 Inch Coil

Looks Great Charles!!!! what did the final weight turn out to be? Looking forward to hearing the results of use in the Field!!!!

Good Luck

HH

Beachcomber

[Beachcomber]

Aureus

How much longer before the Aureus will be available? That sounds like a great machine. Finally someone who is putting Audio ID in a Non-metered straightforward machine!!!! Something I had hoped they would have done with the X-5 or in Tesoro's new Tejon but for some reason American manufacturers just refuse to give us Audio ID other than Fisher that is. The only other way to get Audio ID in the States is to buy Minelab.

Thanks

HH

Beachcomber

[Charles (NY)]

Weight

It didn't seem to bad until I bolted it onto the Explorer and swung it...well its toooooo heavy. I narrowed the mold dimensions but poured it .200 taller darn it...a whopping 3.5 pounds.

I'm going to try two things, first since I still have a gallon of this brute strength resin I'm going to pour just enough to secure the coils, then I'm going to fill the center with foam and pour the sides and bottom created basicaly a hollow tube. Monday I'm going to order up some of that lightweight smoothcast resin and try using that for the center.

There's not much room to work, the wire coils together with the ABS shell weigh 15 ounces so at best I can use 1 pound of resin.

[Sean Goddard]

Re: Aureus

Hi Beachcomber.

I'm hoping the prtotype will be vailable around mid November. This will be put out to four of five people with the instruction to "break it if you can".

From the above we will evaluate what breaks and go back and redesign it until it doesn't break.

I am not going to let this machine onto the market until I am satisfied that it is 100% of what I claim it to be.

The Spec' is now fixed, although there MAY be a new type of disc system using TWO pots.

How this will work is, say you set pot 1 to 4 on the panel and pot 2 to 6 on the panel, there is then a switch for "reject" or accept", if in accept, ONLY the items that fall BETWEEN the two pots will be accepted, and the opposite for "reject". This allows the user to set a variable width notch visually.

If pot 2 is turned FULLY anticlockwise it clicks "off" this then makes disc pot 1 behave as a normal disc control.

VERY simple and effective.

The micro does all the internal signal switching on this machine and does NOT in any way directly affect the received signal, unlike Tesoro who use the micro to detect the target and decide whether of not to beep.

Basically the micro just sits there monitoring the machine and controlling the signal path through the various filters. This is how I belive a micro contolled machine SHOULD be designed, unless you are going for a truly digital system, and that needs at least 18 bits (not the 12 used in the uMax range) of resolution to be even a mildly competent machine (IMHO).

[Norbert]

Re: Aureus

Hello Sean!

You are talking about 12 bits used by Tesoro µMax. Do you know the type of ADC or µController if the ADC is internally?

Thanks
Norbert

[Beachcomber]

Re: Aureus

Thanks for the info!! That sounds excellent. The dual Post idea that can be used for accept or reject and essentially making possible an adjustable size notch window sounds great. At times when hunting the beach I would have liked to have had the ability to reject iron and highly conductive coins and concentrate on targets that fall in the low to mid-conductive range(gold rings) so this feature would be one that I would like to see. I have always had the problem that if I hear it I dig it so if I don't hear the coins I can leave them behind Thanks again for the information!!!!!! I wish you the best of luck with this new detector. I know I will be keeping my eye on it's progress!!!! Years ago there was an AMerican detector that had both notch accept and notch reject and you could move the notch anywhere within the discrimination range but unfortunately it was a very narrow notch with no way to adjust the size of the window. I had always thought it was a great concept if only it had been taken that one extra step. That machine was a Teknetics Mark 1.

HH

Beachcomber

[Sean Goddard]

Re: Aureus

Tesoro seem to use the PIC16F677 ( I think) try peeing back the label on the micro to prove this.

As I dont have one to hand, Icant be sure if I have the right number so the one above is from memory (a bit vague at my age) ;-)

[Charles (NY)]

Notching out coins...

But wouldn't you miss the jewel encrusted silver crosses worth 10's of thousands of dollars?

[Beachcomber]

I've never seen one of those in NJ ....

If I was on the East Coast of Florida I would think that might just be a possibility

HH

Beachcomber

[Norbert]

Re: Aureus

But the PIC16F677 only has a 10 bit ADC not 12!

[Sean Goddard]

Re: I've never seen one of those in NJ ....

I hope not ;-) (notch them out that is)...

As you can set the width very accurately. Initial tests show it's possible to notch out ringpulls and STILL get a reasonable response on 9ct thin gold rings (in air) though how this will fair in the field remains to be seen.

[Sean Goddard]

Re: Aureus

Hmm.. OK I told you my memory was rusty ;-)

[Joe]

Re: Finished 21 Inch Coil

Charles,
Excellent job! What did you coat it with and can you tell me a little about the procedure.
I'm building my first Pules flat coils now and was wondering if fiberglass was the best material to mold it in? HH Joe