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Air test 4 machines results

WV62

WV62

Well-known member
Just thought a few may be interested.

Ron in WV
 
The one that surprised me was the F5 which happens to be my brothers machine, and the disappointment in the F75 which happens to be my machine.

Ron in WV
 
I'm surprised by this test. Ron, did you do the tests yourself or was it taken from a website ? All metal mode ?

I'm especially stumped by the ring results. Silver or gold ? In theory the F75's freq should make it go deeper on gold right ? I'd like to see a similar test done on smaller or non coin shaped objects like gold pendants, ear rings, etc. I remember Mike Hillis test of the gold bug compared to the F5 and in smaller low conductive objects, the gold bug definitely pulled ahead of the F5.

A test to include the Omega 8500 would be cool too with its boost modes. I did my own tests between the Omega 8000 and F5 a while back and there was no difference at maximum gain, zero threshold.
 
These test were all done be me and I was running disc mode and as hot as I could get the machines. The ring I was using was my wedding ring which is 14K yellow gold.

Overall I was also surprised, that is why I posted the results, that F5 doesn't seem to care what kind of metal you put in front of it, it reads it strong.

The reason I don't test a lot of small gold items is because nobody has the same items.

I would guess that the higher KHz detectors would do better on small gold jewelry than the F5 with that 11" coil, now you put a 5" coil on it and it and it may do real well.

As for other detectors, I am just about out of what I can get my hands on.

I was also wanting to know why my little brother SL52 with the F5 that posted above finds more silver than I do when we hunt together. Tomorrow I will be hunting with my 1270 with the stock 8" to see if that gets me in the ball park with little brothers F5.

Ron in WV
 
Thanks Ron.

When you mention you were running the machines as hot as you could get them do you mean you were running the F5 at 99 of gain and positive threshold ?
 
On the F5 being it has a lot to adjust I spent hours adjusting and trying to find the best settings for max distance I could read from the coil. So for this one I was running sensitivity at 70 and you see from the attached track chart that at higher settings the air test distance would drop off.

I also did some small gold testing just to get a sweet spot for gold.

Study those charts a little and you should be able see what I was doing, the numbers in the boxes are inches. I did this chart just for me and hadn't planed on showing it to all.

Hope this helps, if not just ask, I will try to answer.

Ron in WV
 
Now for the Tejon and the 1270 I ran the sensitivity up to max and then backed down until they quit cracking and popping. The F75 I was able run it at 99 sensitivity.

Ron in WV
 
Those are great looking charts. I wonder if findings would transfer to the ground. Usually one tries to max out gain as high as it can go before EMI sets in or trash/falsing makes the detector go nuts. I find it strange that going up on gain past 70 actually decreases depth with threshold at zero. For coins I usually hunt with gain at 95 and threshold at zero or 1. I find the F5 mostly quiet even with high gain settings.
 
I was wondering didn't you or your brother have a 1266? How did it do on a dime? I got a old Wilson RC II That will hit a dime at 9" with a 7.5" coil so that's pretty good for a detector made in 1990. My CZ-3D is still king at 12.1" on a dime.
 
Harold you got a good Cz-3D the one I had came back with a 8.125" sticker on it, Tom said is it what is and he couldn't get anymore out of machine. My brother MarkCz does have a F70 and a 1266x but I haven't ask him for his machines to do any testing.

The why I kind of look at the 1266x is it would be a little like the 1270 and the F70 would be kind of like the F75.

My brother SL52 went hunting today and he ice the cake with his F5 again today. He will be post later.

Ron in WV
 
Yes and believe it or not it is a FT unit. Tom Tuned it and said it was up to that point the hottest FT CZ-3D He ever calibrated. It is also the best out of the 6 I have owned in iron. And that includes a couple 1021's.
 
Harold said:
I was wondering didn't you or your brother have a 1266? How did it do on a dime?
Click to expand...

Yep! that would be me, I'm the 'Little' little brother.
I just tested my early version 1266 on a silver dime with the stock 8" coil (actually the coil is a newer 8" 1270 coil). The response was pretty good @ 9.5" still there @10" but I doubt that it would be a stop and 'DIG' signal.

I'm thinking that as far as DEEP silver and in recent times between us three brothers the Omega 8000 I had and I probably recovered the deepest silver coin, I'm thinking it was in the 10" range and that was In The Dirt!, it was a Barber Quarter. Then in the same area I think the next season I did another deep silver quarter, a Standing Liberty that I'm thinking was in the 9" range, so I may have the two deepest coins of the three of us. Thinking back about that last quarter, I may have gotten it with the F70? I NO for sure I got the Barber with the Omega!

Mark
 
Nice Barber Quarter. I haven't found one of those in a while. It sounds like you got a fairly hot 1266. I have yet to try a 1200 Fisher but had every CZ made in 16 years. I will have to try at least one 1266 before I leave this earth as it is such a legendary machine made by the Great Dave Johnson!
 
Harold said:
Nice Barber Quarter. I haven't found one of those in a while. It sounds like you got a fairly hot 1266. I have yet to try a 1200 Fisher but had every CZ made in 16 years. I will have to try at least one 1266 before I leave this earth as it is such a legendary machine made by the Great Dave Johnson!
Click to expand...

It is a bit odd as to how I came about owning my 1266.
I have a neighbor that I often times help out and one day I'm looking out my front door and here he comes with something across his shoulder, so I go outside to meet him and he says, "can you use this"? and he hands me this metal detector at first I was still paying more attention to him taking about where and how he got it (A doctor friend of his). I know he's not into metal detecting at all and I know that he has drove by my house many times while I'm out in the front yard trying out a detector, so he knew I was. Then I start looking it over and I noticed it said Fisher on it, then I noticed it read 1266 on it!! I had never owned one before, but I knew of there history and I thought, man if this thing works this is GREAT!
Well, it indeed did work but some times I had trouble getting it to come on which ended up only being a wire loose in the coil connector, I re-soldered it and its worked perfect ever sense.

Mark
 
I did a few tests of my own on my F5 and my results are not the same at all. With zero threshold in all metal mode if I turn the gain down to 70, I lose exactly an inch on all targets. Not only that but good signals seem weaker as if the volume is turned down somewhat. This is compared to the gain at 99 but not pegged out. Logically this makes more sense. I also tried in discrimination mode (discrim set at zero) and again I lose about an inch on all targets when I turn down gain from 99 to 70. Again, this is with threshold at zero. I tried this with my 5 usual targets (copper penny, silver dime, silver quarter, CAD 2 dollar coin, silver ring).

Also, I lose between 1 and 2 inches on all targets just from switching from all metal to discrim (set at zero).

As long as my machine is relatively quiet (low EMI, no falsing), I'll stick with high gain settings for coins.
 
Dfmike, I'm no expert on metal detectors by any stretch of the imagination but I'm going to go out here on a limb and guess that all model f5s would not test the same with being tested in the exact same conditions, maybe that's why my f5 peaks out at 70 gain and yours goes better at 95 gain. Same thing with about any product.
 
I don't think we have any place around here where you could detect more than a 10 foot square in a long day using All-Metal. But! all the detectors I've ever had would go deeper in all-metal vs disc mode and zero disc is still discrimination mode. When your running all-metal getting the ground balance exactly right is more of a necessity than in disc mode too.

Mark
 
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