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Help: Simple T2 and F75 Comparison!

B

BTaylor

New member
If you happen to own a T2 and a F75 please try what I did. I am trying to determine if my F75 is working normally.

I walked a straight line (same path) in by back yard from one point to another of about 30 feet in distance with both the T2 and the F75 set to there default settings. The T2 was picking up targets in the ground on just about every swing of the detector, but over the same distance the F75 only gave an indication of a target only 4 or 5 times. My T2 responded to different targets at least 20 or more times over the same path.

I realize the iron range on the F75 is notched out, but very few if any of the targets indicated on the T2 were in the iron range.

If you can try the T2 and F75 as I did, and please let me know your findings!

Thanks, Bill
 
Hi Bill,

Was the T2 picking up real targets or only small signal iron falsing? If you could put them both into the 2+/2f mode and try again you may notice a difference.

HH

Mike
 
Hi Mike,

I will try what you suggested. I have one question which may answer my question as to why the T2 and F75 do not respond the same in my back yard when in default modes

When you originally tested the T2, as I recall you were not able to use the T2 in highly mineralized soil. Are you now able to detect those locations with the F75, or is the F75 more use able in those areas?

When I have time, I am going to dig 6 or 8 targets that the T2 indicates, that the F75 will not detect and see if there is anything there. I assume the F75 handles mineralized soil much better than the T2? I will keep you posted.

Thanks again, Bill
 
Bill,

I found the F-75 proto to be quieter in my noiser areas. I have one location where the ground required me to run the T2 sens in disc mode between 40 & 50 to get it quiet enough to use. At this same location I could run the the F-75 proto between 70 & 75. This location gound cancels at 84 and the FE3O4 meter primarily reads a .3
Sometimes I would find an area at this site that would drop to a .1 but most of the time it is a .3

The CoinStrike does well there.

The F-75 proto was sweet there in both the small iron and the alum trash areas within it. I didn't notice any loss of sensitivity to anything but the ground.

That's why I'm wondering what the T2 is picking up that the F75 isn't. I think the 2+/f mode will help determine this. Both disc settings at 10.

Thanks,

Mike
 
because 10 on the T2 would be wide open and 10 on the 75 would be roughly 2/3 of the iron disc'd out. Right?
 
I noticed that 0 to around 6/7 with the F-75 seemed to me to act like the T2 below 10. By that I mean it was wide open to both internal and external noise. With a setting of 10 it was electrically quiet at a certain sens level while I still got iron response. The T2 would need a disc of 25 to achieve the same level at the same sens level. From there the T2 still has 15 more numbers of iron discrimination were as the F75 only has 5 more numbers of iron disc.

So you could well be correct in your thoughts that the T2 is picking up iron or tiny targets that the F75 is not. Thats why I'm curious what the 2+/f tone mode with a 10 setting will show.

HH
 
This has been helpful to me if I wanna hear some iron & unmask in thick iron trash.....
HH,
Bill
 
Hi Mike,

I just ran a test in my back yard again. I used golf tees to mark the spots that I detected with the T2. I then tried to detect the same target with the F75. Both detectors were set on default mode with the tones set to 2+ for the T2 and 2f for the F75.

Here are the results: (T2-23, F75-0), (T2-26, F75-0), (T2-30, F75-0),
(T2-19 to 25, F75-0), and (T2-28 to 32, F75-0)

Both detectors pinpointed metal under the golf tees although I did not dig the targets. As you can see the F75 does not give an ID response or an audio response for the targets that the T2 detected.

The targets were chosen at random by the T2. I just picked targets that gave a good ID and audio responses when detected by the T2.

I think you can get an idea at what is happening, but why? The F75 should detect the same targets that the T2 does. This may also
explain why I am getting random target ID's with little or no audio
response when I hunt with the F75?

I tried to put the result in a column form, but I was not successful.

Is the F75 notching out the ID's in the T2 range, since the iron for the F75 is not as wide as the T2? Please let me know what you think.

Thanks again, Bill
 
As it is obvious that the way you got them set up at preset that they are not equal. Also put all doubt to rest and dig the targets that will tell you all you need to know. Just my 2 cents worth. Have not got the F75 yet to test first before I buy it. From what I have heard from some of the guys that have done the testing looks like I will get one. I have got to thin out the field of detectors I have . Anyway like I said my 2 cents worth and JMHO. :D: :D: Jerry aka Tinfoil
 
Hi Bill,

That was just what I was suspecting was taking place. The T2 with it's expanded iron discrimination range is picking up small iron that is smaller that the F-75's default iron disc range setting of 10.

If you'd be willing to go back with the F75 to the targets with the 30 number and the 23 number and decrease the disc setting until it picks these two up, you'd have a good idea of what the ratio difference is.

A setting of 10 on the F75 is 2/3rds of the available range. a 30 number is 2/3rds of the T2 range and the 23 is just about the 1/3rd range of the T2. Since the 30 number target wasn't picked up by the F75, that ratio isn't exact.

Good stuff!

Mike
 
Hi Mike,

Thanks for you help. It makes perfect sense now. I guess I need to start speaking the language of the F75, and forget about the T2 for now. My comfort level with the T2 is extremely high.

I must learn the idiosyncrasies of the F75, and close my mind on how the T2 would function in the same environments. Keep me posted on your
experiences with the F75.

Thanks again, Bill
 
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