I will be retiring in the coming months and am preparing to get back into prospecting. My plan is to go "high tech". My view is that I may want a VLF to search for small targets then switch to a PI to punch down deeper for any other potential targets over the same area. I'm leaning strongly toward the Gold Bug 2 for my first detector. I understand after doing some research and watching a bunch of videos on YouTube that the GB2 really excels at recovering small gold.
My question is, considering it's operating frequency, what kind of depth is possible with the GB2 and considering ground mineralization?
Although we own Minelabs-Equinox, GP's & other detectors, more and more often my brother Jim and I are using the Gold Bug 2. We've discovered that when we find a patch and after the small nuggets are found, tiny pieces still remain. At the end stage, we can get even more pieces by raking the area. Jim made me this collapsible rake, from a tiny collapsible four tine rake and a welded-on eight tine piece. I can carry it in my backpack and it looks like just the tool for those tiny pieces.
By Steve Herschbach
Fisher Gold Bug Operating Manual, 307 KB pdf file, 32 pages
Fisher Gold Bug Data & Reviews
Fisher Gold Bug Color Brochure
First Texas (Fisher) Forum
This is the manual for the original 1987 19 kHz Gold Bug model. It was revised in 2001 and pictures of the Gold Bug 2 were used for the cover and layout pages, but the manual is for the older "black face plate" model.
By Steve Herschbach
Fisher Research originally released the 19 kHz Gold Bug model about 1987. It was a real breakthrough design at the time with a compact control box, S-rod, and elliptical coils. The detector is a good unit but is strictly all metal (no discrimination). It has no LCD readout and looks much like the current 71 kHz Gold Bug 2 but has a white lower rod and a black control panel face. Some people are confusing this old model with the new so be aware of this when looking at used detectors. The 19 kHz coils for the old Gold Bug will not work on newer versions of the Gold Bug below. The 71 kHz Gold Bug 2 is a totally different detector than the various 19 kHz models described below.
Around 2010 a number of new Gold Bug models were released by Fisher. First came the Gold Bug in 2009. Then came the Gold Bug SE (Special Edition) which added manual ground balance at a bargain introductory price. The SE with minor tweaks later became the Gold Bug Pro at a higher price. So now we have two basic versions, the Gold Bug and the Gold Bug Pro. They differ from the old 1987 model by having an LCD readout. The standard version of either detector comes with a 5" round coil. There is a Gold Bug DP (Deep Penetrating) which is nothing more than a Gold Bug Pro with an 11" x 7" DD elliptical coil instead of a 5" round DD coil.
The only difference listed by Fisher between the Gold Bug and the Gold Bug Pro is that the Gold Bug Pro has a manual adjustment option for the ground balance and also offers "higher sensitivity".
Both models use a "Ground Grab" button as a simple ground balance method that is quite effective. The Gold Bug Pro allows you to also manually adjust the ground balance setting up or down. The manual adjustment can be used in conjunction with or separately from the Ground Grab button.
The big question is the "higher sensitivity" claim. There are two possibilities here. First, that the Gold Bug Pro actually allows for higher gain or sensitivity levels. However, I was in marketing too long and have a more jaded thought. Manual ground balance allows for a higher degree of control that if used properly can get you more sensitivity. There is a very distinct possibility the higher sensitivity claim follows directly from the ability to manually ground balance the Gold Bug Pro. This could be tested with both units set side by side with identical ground balance settings and max gain. If the Gold Bug Pro is inherently more sensitive an air test should show it. I have not had the chance to do this my self but if somebody wants to there you go.
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My opinion? I believe the Gold Bug and the Gold Bug Pro if outfitted with the same coil are basically the same detector. The only real difference is the manual ground balance option on the Gold Bug Pro. Do you need it? Not really, and especially when you consider that for $499 vs $649 that is probably all you are getting. The Ground Grab function is remarkably effective and would suit most people just fine.
I personally do like manual ground balance and so for me spending the extra money to get it is a non-issue. I do as a rule tell people that if cost is not an issue get the Gold Bug Pro. It is far more popular and would be easier to resell. But in all honesty I think the Basic Gold Bug is the real bang-for-the-buck unit. There is nothing else close to it at the $499 price point that offers full LCD readout target discrimination while in full power all metal prospect mode.
I should note that First Texas owns both Fisher and Teknetics. The Fisher Gold Bug DP (Gold Bug Pro with 11" coil) is marketed by Teknetics as the G2. The Fisher Gold Bug DP goes for $699 and the Teknetics G2 is $749. The $50 extra gets you a pistol grip rod instead of the Gold Bug S-rod and an arm strap. Nice gray paint scheme also. Really boils down to pistol grip vs S-rod, purely a personal preference thing.
I use the 5" x 10" elliptical myself and consider it to be the best all around coil for the Gold Bug. However, right now you have to get it as an accessory or as part of a two coil package. Fisher would be doing us a service to release the Gold Bug with this coil as standard on the unit.
My Gold Bug 2 is slightly better on the tiniest of gold but the Gold Bug Pro easily outperforms the Gold Bug 2 on larger nuggets at depth. For all around nugget detecting the Gold Bug or Gold Bug Pro (and G2) have a better balance of both small gold and large gold capability than the Gold Bug 2.
Fisher Gold Bug Pro & Teknetics G2 Detailed Comparison
To recap first came the original 1987 era Gold Bug with knobs and switches:
1987 era analog Fisher Gold Bug
Then in 2009 we got the new Gold Bug:
Fisher digital Gold Bug
Followed quickly and briefly by the Gold Bug SE. Note how the plus and minus buttons now have dual functions, both Disc and Ground Balance, compared to the basic Gold Bug above:
Fisher Gold Bug SE
The Gold Bug SE was basically the prototype for the Gold Bug Pro, which got a new faceplate decal and a higher price:
Fisher Gold Bug Pro
And finally, the Gold Bug Pro was also marketed under the Teknetics line as the G2 with a different rod/handle assembly:
Gold Bug Pro DP compared to Teknetics G2:
Click on images below for larger versions.....
So I found this Gold Bug detector for sale. The owner says it is the GB2 which it appears to be by the housing, but I think it may be an earlier version (?). Id appreciate if anyone could give me some info on this unit. In particular, my questions are:
What frequency does it run on?
Is it as sensitive as the GB2?
Is this maybe something similar to the CZ3D where the older models are more desirable/better?