For sale - bare circuit boards for the new Gold-Max Pi V1.1 Super fast 6uS sampling!

[Elliot]

Powerful NEW pulse induction detector that is ideal for finding lost treasure, coins, gold & silver jewellery, relics and small to large gold nuggets!

Features:

• Pulse induction technology (1,600 pulses per second)
• Fastest sampling time ? 6uS for outstanding detecting depth
• High sensitivity and low noise design
• Compatible with many commercial search coils (300uH nominal) or DIY Mono, DD and Twin (Dual) coil options
• Compact 100mm x 100mm pcb size to fit many cases
• External controls for:
  [*=1]Volume (speaker and headphones)
  [*=1]Minimum sample delay adjust (6uS to 25uS)
  [*=1]Gain adjust
  [*=1]Transmit frequency adjust (for EMI interference rejection)
  [*=1]Self-adjusting Audio Threshold (SAT) time (0.5 Sec to 3 Sec)
  [*=1]SAT hold switch (pinpoint)
  [*=1]Sample time switch (10uS / 28uS)
  [*=1]Battery Test

AUD$39 per pcb + packaging & postage (includes exclusive access to the Gold-Max Pi constructors Facebook group and basic build support).

For a free copy of the detailed 41 page illustrated construction document (Mono Coil), or to order, simply send an email request to [email protected]

The detailed component list is only provided upon purchase of a pcb.

[Elliot]

I have a few pcb's left of the current batch.

[bernte_one]

i think it is too expensive, for a single pcb 39AUD are 24Euro + shipping
most people arent able to spent much money in diy detectors, also not during corona time

didnt sold a diy detecftor for long these last year

[kt315]

maybe good price for a detector based on fast micros, with color display 128x128 point, with VDI and good discrimination of VLF type detector.

[Elliot]

i think it is too expensive, for a single pcb 39AUD are 24Euro + shipping
most people arent able to spent much money in diy detectors, also not during corona time

didnt sold a diy detecftor for long these last year

Thanks for the opinion, but I'm not just selling a pcb of a generic unit. There is years of design and testing behind it, and it is the best (i.e. fastest sampling) readily available DIY machine on this forum that I am aware of. It outclasses most commercial units too - except for the very expensive (ie. $5k+) Minelab machines. I also provide construction support, and builders can join a dedicated Facebook constructors group. Cost is one thing. Value is another!

[andon80]

it would be good to see some pictures or test videos

[Emersonpaz]

I agree photos and videos are a great attraction. I was interested but no demonstration is complicated

[Elliot]

For those that want photos and performance information, simply email me at [email protected] and I'll send you relevant information.

[Elliot]

For those that are unaware, pulse induction metal detectors are ALL METAL machines. That is, they do not discriminate between iron or any other metals. They are also less susceptible to mineralised/salty ground and generally detect deeper in the ground than continuous wave machines.

[Elliot]

I have attached some air test results of the Gold-Max Pi using a 12" Advantage Nugget Finder coil (it uses bunch wound Litz wire). A flat wound Litz wire coil will perform even better!

[green]

I have attached some air test results of the Gold-Max Pi using a 12" Advantage Nugget Finder coil (it uses bunch wound Litz wire). A flat wound Litz wire coil will perform even better!

[ATTACH]55934[/ATTACH]

.2 or .02mm thick?

[Elliot]

.2 or .02mm thick?

It's a commercial coil, so I can't advise what thickness wire they use, but I can advise that I've made my own 7.5" flat wound coil that uses 175 x 0.04 Litz wire, and I love it! The 7.5" flat wound coil detects only around 3-4 cm less than the bunch wound 12" coil.

[green]

It's a commercial coil, so I can't advise what thickness wire they use, but I can advise that I've made my own 7.5" flat wound coil that uses 175 x 0.04 Litz wire, and I love it! The 7.5" flat wound coil detects only around 3-4 cm less than the bunch wound 12" coil.

I was referencing your graph. Aluminum foil (Square) 0.2mm. 0.2mm or.02mm?

[Elliot]

As per the graph, it's 0.2mm thick foil.

[green]

As per the graph, it's 0.2mm thick foil.

I've done some testing with regular kitchen foil, closer to .02mm thick. Time constant for 1inch square is about 1.8us. If similar aluminum, 0.2mm thick would be 18us. Don't know why stacking would make it easier to detect.