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australian electronic gold prospecting forum.com  |  Recent Posts
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 21 
 on: Yesterday at 15:36 
Started by Aziz - Last post by Muntari
Hi all,

So I made my creasing tool up last night and didn't get to use it as explained in earlier post but that gave me time to think.
Anyways, I was looking for a tool anyone could get a hold of to help put together a spiral cutter, then remembered the good old pipe cutter.

The creasing wheels are essentially the same type of thing only way more expensive.... so had a look at el cheapo Bunnings stuff and this is what I found.

  

Perfect for the job with a few mods  happy face

Its only the wheel and shaft assembly we need...maybe a little bit of lathe work so it fits into cnc spindle

More on this later but Ill grab one on the way home tonight and butcher it and try.

Cheers

Muntari

 22 
 on: Yesterday at 15:30 
Started by Doug - Last post by Doug
Just the facts, homogenization adjustments reduce global warming
Climatologists make adjustments to climate data to remove non-climatic changes (homogenization). This fact is used to accuse them of fiddling with temperature data to create or exaggerate global warming. This is often done by showing for a small piece of the data and suggesting it is typical.
  
link-http://variable-variability.blogspot.com.au/2015/02/homogenization-adjustments-reduce-global-warming.html
doug smile

 23 
 on: Yesterday at 15:29 
Started by Aziz - Last post by Muntari
  
Hi Muntari,

I used a brown paper backed white paper almost like wall paper from IKEA and glued it on, self adhesive would be a better option the bad news I did the self resonance tests today using a piece of coax I had hanging around the coax measures 113.7 pf and the self resonance of the coils with shielding and coax are 361 KHz and 353 KHz so too low I think.

Regards, Ian. happy face

Hi Ian,

Thanks for the info, that's disappointing for you on the capacitance but perhaps with some other coax it can be lowered.
I'm back in the workshop over weekend to produce a coil of similar size so it will be interesting to see the Cp on that with shielding.

cheers

Muntari

 24 
 on: Yesterday at 14:56 
Started by Aziz - Last post by IBGold
Hi Muntari,

I used a brown paper backed white paper almost like wall paper from IKEA and glued it on, self adhesive would be a better option the bad news I did the self resonance tests today using a piece of coax I had hanging around the coax measures 113.7 pf and the self resonance of the coils with shielding and coax are 361 KHz and 353 KHz so too low I think.

Regards, Ian. happy face

 25 
 on: Yesterday at 12:30 
Started by Doug - Last post by Huego
  
PAYDIRT ???
Proudly sourced and packaged in Australia by
"Eureka Prospecting", Deepwater, NSW.
  
What do you all think?
doug smile


They are selling a PROMISE / CHANCE (ie a gamble, a part of prospecting) with the fun & hope to find discover gold at home. These sorts of paydirt sales are done by US gold miners too. Probably use heavy concentrates spiked with some fine gold & gemstones to meet their guarantee. I can just see it, a pinch of fine gold & pinch of mixed fine gemstones to comply with their promise:-

"...We guarantee each bag of PAYDIRT contains Gold, Sapphires, Zircons, Amethyst and Crystals. It may also contain (but is not limited to) Diamonds, Garnets, Topaz, Casserite, Citrine, Molybdenite, Devils Dice, Pyrites, Mica, and Magnetite.

.... keep it small and packed with concentrates that will not disappoint..."

The Gold contained in each bag of PAYDIRT varies in size and type from extremely fine mustard gold, to flakes and up to tiny coarse pieces which can be picked up with your fingers.


I see little wrong with it. It may introduce people to gold panning and give them a chance to practice and discover a thrill of discovery at home.

 26 
 on: Yesterday at 11:55 
Started by Doug - Last post by 6666
WE APOLOGIZE, BUT THE MOST RECENT PAYDIRT RELEASE HAS NOW SOLD OUT

 27 
 on: Yesterday at 11:35 
Started by Doug - Last post by Doug
PAYDIRT ???
Proudly sourced and packaged in Australia by
"Eureka Prospecting", Deepwater, NSW.
  
What do you all think?
doug smile

 28 
 on: Yesterday at 00:16 
Started by Aziz - Last post by Muntari
  
  
  
Hi all,

I have started shielding the prototypes the first one is finished and I am pleased with it so far the specifications shielded are Inductance 707 uh resistance 9.98 ohms shield to coil capacitance is 81.2 pf I like the carbon to paper shielding but it is a bit fiddly to apply here are some pictures for your information and it looks like SRF will be above 500 KHz.

Regards, Ian.

Great work Ian, how long did it take you to assemble..?

Hi Muntari I applied the shielding to the second coil today and it virtually took all day so it is not quick but this one turned out a bit neater I will measure the coil to shield capacitance tomorrow.

Aziz yes now the fun starts with coax I will have to see what I can get for my configuration I only need 1400 mm so we will see.

Regards, Ian. happy face
Thanks Ian, do you apply the carbon to a adhesive backed cardboard or paper?
Made my little tool up for creasing the spiral pattern tonight, purchased some more foamed PVC on way home, had an early dinner, out yo the shed started Cnc up zeroed everything, about yo push the start button, then son phones and wants me to take him to look at 4wd about 2 hrs drive away....so maybe over weekend I can try the creaser out... Will post some photos of the test.



Cheers

Muntari

 29 
 on: Thursday February 22 2018 18:57:32 AEDT PM 
Started by sd220d Digger - Last post by Doug
  
I saw that YouTube
It's a shame that Stinky Pete didn't dig up and show what those
targets were?
You would need a  very long  handled spade to dig out some of the targets!!
doug smile

 30 
 on: Thursday February 22 2018 16:12:35 AEDT PM 
Started by Aziz - Last post by IBGold
  
  
Hi all,

I have started shielding the prototypes the first one is finished and I am pleased with it so far the specifications shielded are Inductance 707 uh resistance 9.98 ohms shield to coil capacitance is 81.2 pf I like the carbon to paper shielding but it is a bit fiddly to apply here are some pictures for your information and it looks like SRF will be above 500 KHz.

Regards, Ian.

Great work Ian, how long did it take you to assemble..?

Hi Muntari I applied the shielding to the second coil today and it virtually took all day so it is not quick but this one turned out a bit neater I will measure the coil to shield capacitance tomorrow.

Aziz yes now the fun starts with coax I will have to see what I can get for my configuration I only need 1400 mm so we will see.

Regards, Ian. happy face

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australian electronic gold prospecting forum.com  |  Recent Posts


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