Gold Monster Vs 24K Vs Gold Bug 2 Or...........

[kac]

Apex format is nice, I agree with Jeff they really handicapped the machine audio wise.

Audio tone is so short it is very easy to run it too hot. If they made a new version that had a true all metal mode and much like the AT Gold but in SMF format I think it would have potential but why if they have the 24k?

Though I am not a nugget hunter I do love the Gold Racer and use it for coin and relic hunting.

[Redz]

3 hours ago, Aureous said:

Any CC or DD coil can function as both PI or VLF, provided both sides of the circuitry matched the specs of the coil. Mono's cannot work though coz VLF (Induction Balance) needs two coil windings for transmit and receive.

Doesn't this argue for a DoD coil like the GPZ?

[Kevin Patz]

I use the Gold Bug 2, and I love everything about it's decades old design, Yes the updated version doesn't impress me, I think their marketing department was trying to keep up with the Gold Monster's sexier appearance that makes new hobbyist think that the gm is something better then it really is. Put a newbee in front of a GB2 and a GM, they will gravitate towards the  GM I'm sure. I don't think I would use any vlf for nugget hunting with all the hot rocks. Maybe because I just detect in mostly quartz hard rock tailings I'm not seeing the same problematic issues.

[Geotech]

12 hours ago, GotAU? said:

Has anyone ever tried making a combination VLF/PI machine?

At White's I designed a transmitter and analog front end for a combined MXT+SMPI. I breadboarded it and it worked, but never built a prototype because I mostly did it on a bet. It was intended to be a switchable design, not simultaneous.

But then I built a truncated half-sine system which was a true hybrid VLF+PI system. The prototype was working great, already beating the TDI. I was working on auto tracking and disc when I left White's. No one ever picked it up and continued and now Garrett owns the patent.

[Aureous]

3 hours ago, Redz said:

Doesn't this argue for a DoD coil like the GPZ?

Yes that could work....I dont think any company has trialed a DOD coil for Induction balance design yet? It still uses twin windings...but will depend on if there's a benefit to doing that or not.

[Dain Blackburn]

I wonder why no body has implemented the" Follow The Black Sand" feature on the old White's GMT.

I know 24K has a bar graph that with tell you the amount of minerals but the GMT put the information in numeric form.

I was searching a site and found were they were processing there concentrates and used my GMT effectively to map a small area. I was pumping the coil and watching the numbers like 25, 30 and maybe a 40 then I would see a number like 60.  I would drywash the high number areas that I mapped and found some good gold they lost on this commercial placer operation. They were sloppy is my best guess feeding a Knudsen bowl too fast or to much water. They spread out all the black sand tailings with lost gold with dirt mixed before they left. Iam keeping my GMT just for that feature. 

[GoodAmount]

On 1/10/2023 at 5:03 PM, Geotech said:

At White's I designed a transmitter and analog front end for a combined MXT+SMPI. I breadboarded it and it worked, but never built a prototype because I mostly did it on a bet. It was intended to be a switchable design, not simultaneous.

But then I built a truncated half-sine system which was a true hybrid VLF+PI system. The prototype was working great, already beating the TDI. I was working on auto tracking and disc when I left White's. No one ever picked it up and continued and now Garrett owns the patent.

Would the patent still be current? Fingers crossed Garrett dusts it off and gives it some development time. It could turn into the next big thing.

[Steve Herschbach]

What I wanted to see in the Gold Bug 3 that never appeared, was the ability to downshift from 71 kHz to 18 kHz (71 divided by 4) giving us an early version of what is now called the XP ORX. That alone would have been enough, but adding two tone ferrous/non-ferrous would have been better yet. Instead, we were offered the Gold Strike, and that did not go very well for the old Fisher. People really were expecting a Gold Bug 3, and the Gold Strike was as far from those expectations as you can get.

[Aureous]

The true PI-IB hybrid would potentially give us the 'holy grail': actual iron ID or discrim at full or near-full depth. Write up some decent code to deliver actual high coil energy saturation with low'ish sample delays and you could have an amazing deep iron ID relic detector or deep nugget hunter that should give the GPZ a run.