A friend who is a pure inland coin hunter is considering the F-75 Ltd vs T-2 SE

[vlad]

The F-75 I have used-the T-2 is an unknown quantity-my old pal Bill Ladd really likes it, but he has not been around Finds for some time.
F-75 vs T-2, pros & cons? (Also, is there a concentric available for the T-2?)

 

[Sven]

No concentric coil for the T2 or I would have one.

 

[vlad]

could connector be changed?

 

[REVIER]

could connector be changed?

No concentric coils available because the T2 is not designed to use them...at all.
Fishers can use both...and I do.

 

[Elton]

T2 has better discrimination for coin shooting.. A real coin finder in my opinion and at very decent depths.
It does not have save settings on turn off or turn on.. But only takes a few seconds to set up..

 

[vlad]

I cannot think of a reason why mechanically/electronically a concentric won't work on a T-2.
Could it be more a marketing decision? With these companies interconnected; the F-75 being more expensive, if
the T-2 had a concentric available and less expensive, users might find it hard to justify the higher F-75 cost.
As its set up now, you have two (apparently) dissimilar detectors.

 

[jd88047]

I know coils are not interchangable. T2 is used as a gold detector overseas. Having used the F75 for many years I was very happy with it. Since the purchase of my etrac I have not used it very much. But refuse to sell the F75. I hunted right next to a T2 and watched it pull many gold rings, but not so many coins.

 

[vlad]

loop interchangability among the brands are some what common-even if some efficacy is lost.

 

[lytle78]

Not a marketing decision on T2 DD use. I suspect they figured out how to make the darned thing work with DD and some features of the software or hardware design were super optimized for the DD coil. This detector was groundbreaking - noth\ing like it was on the market. Since then, lots of companies have done similar things, based closely on the T2's method of doing what it does - imitation, not piracy (althoigh there was piracy by criminals in China).

The F75 came later and was designed in such a way that it could use both coil types. Here's an old post on this subject from Pimento in late 2p11

Digger - They're different internally. The receive coil is identical, I think, but the transmit coil is unconventional on the T2, and appears to be centre-tapped. This need for a centre-tapping is why you can't get concentric's for the T2. A conventional concentric coil, with the small bucking-coil next to the receive coil is not really viable with a centre-tap. The electrostatic shield may also be joined up differently.
See this thread:
[www.dankowskidetectors.com]

 

[vlad]

and people lamenting the terrible performance with bottlecaps, and many though it was the loop design. (many liked it though & Bill Ladd still uses one)
Ty Brook who who has been writing the Tech Talk Column for WET forever, aimed the bc problem being with the loop windings being on different levels.
I admit I have not been using as long as some-but I've learned something in the 46 years I have used detectors.
And one thing is that things are usually overly complex in the explanations to hide something obvious.
Marketing is a major influence and if something sells-you don't change it much. Introducing a modified version, under a different marque
is salesmanship.
But you can draw your own conclusions.
(As to DD's AH had them in the early '70's; and George Payne said when he was with Whites they had a DD that practically eliminated ground mineral effect-I think he
was with Bty Htr by 77-78. But all coils are pretty much gated the same way; magnetic coupling through alignment, and capacitive coupling from proximity-though a grounded
shield can be used to alleviate or minimize the capicitively coupled signal by shorting it before it reaches the detector coil...but this can cause eddy current coupling...
It seems to be a chain of pro/cons on search coil design. And while simpler DD's can get you easier if you are not careful)

 

[REVIER]

I cannot think of a reason why mechanically/electronically a concentric won't work on a T-2.
Could it be more a marketing decision? With these companies interconnected; the F-75 being more expensive, if
the T-2 had a concentric available and less expensive, users might find it hard to justify the higher F-75 cost.
As its set up now, you have two (apparently) dissimilar detectors.

Maybe Dave Johnson will come on and explain this again more fully because he has commented about this subject before, he was a main design engineer on both I believe.
He is not in marketing, just the technical side and he has talked on forums before about this interchangeably thing.
He admitted that some coils can be interchanged between units, sometimes with no issues, sometimes with some measure of degraded function whether it would be lose of depth, VDI numbers not lining up or whatever.
Don't quote me but I think I also read that he said if you do manage to mount a concentric on a T2 you just won't like how it would work...in the slightest.
It is not marketing...it is a design and programming incompatibility issue.

On the other hand using DD coils on the F70/F75/T2 platform is not really an issue at all while using DD's regarding pop tops.
There are fast, efficient and pretty accurate techniques that let you ID and avoid these things about 95% of the time...I do it everywhere I go since many of my sites are loaded with these things.
I use DD's most of the time on mine but I also switch to my concentric from time to time and I will never let it go.
Not because of the pop top thing but for other reasons...more of a unique response, slightly different behavior and different sounding super sweet tone thing with me because concentrics and DD's on my F70 do sound different and I love using both.
When I put it on the first tone I get with it swinging over that first target always makes me smile.
http://www.findmall.com/read.php?37,2296414,2296729#msg-2296729

Fishers and Teknetics machines seem to find the goods no matter what coil you have mounted.
I just love that I have the option to use both optimally.

 

[coast40]

 

[REVIER]

Dave J. mentions the T2 circuit and concentric coil stuff here...
http://www.findmall.com/read.php?58,2313457,2313951

I tend to believe him but that's just me.

 

[Elton]

Slight difference in the specs if you read the manual may account for no concentric coil ?? It's also possible the processor wasn't set up to accept concentric coils readings.
I myself have always preferred the concentric coils when coin hunting..and originally the T2 was touted as a relic hunter way back when first released.So DD would have been the choice.

 

[amberjack]

small DD coils from my experience 5" and smaller do not hit beer caps , I am no engineer but it must have something to do with single freq and bigger windings what else can it be

AJ

 

[jd88047]

I really can not call this one. The difference between the two machines is how many notches of Iron Discrimination each one has. The T2 has more Iron Disc settings. Both are a fine hair to tune but the T2 is more stable. Depth is there. F75 has a basic mode that will hunt right out of the box. Once you start tweaking it you will have fun just trying to fool it. You will dig bottle caps, they mimic the size of a coin. Thats how the F75 reads coins by size. You can pump the coil up and down to check for a bottle cap and it will grunt or null id a bottle cap. I also dug the smallest pieces of foil and metal with the F75. The F75 is over kill for coin hunting. The 5 inch coil will do a good job in trash, but after the upgrade to LTD 2 the stick coil is best. You dont need other coils for what I hunt. Hope this helps and not confused anyone.

 

[Mike Hillis]

The T2 was built around the 11" Biaxial coil. The coil was 1st Texas Products first DD style coil and they built a brand new machine around it. The T2 and that coil were unveiled to the metal detecting world together.

HH
Mike

 

[JJames1610]

I don't know about the f75, would love to try one. I can comment on the t2 ltd. I have had mine for about a year, and just love it. My opinion up to now is, that its the best detector i have ever used. I have tried a plenty to. Just to show the depth of it. I have a cookie can, probably about 12 inches wide and 4 inches deep. Its empty and buried at a measured 36 inches. In bp or boost program and sensitivity at 88 and no discrimination, i can get it with the t2 ltd. Thats just impressive to me.
But honestly I don't think you can make a wrong choice with either one. I don't known this for a fact but i think the f75 ltd se is a tad better. Just my thoughts

 

[Mega]

Never used a F75 but i do own and use a original T2 which i have had for nearly 10 years i guess,it was my main detector till i got a Deus,but still use the T2 on a regular basis and its also found me the most gold coins ie celtic gold staters both full and quarter,George111 Guinea and Viccy Sovereigns as well.On trashy ground the small 5'' coil is deadly but for everyday use i use the NEL Sharpshooter coil.

The T2 must be one of the easiest detectors to setup,just seconds then out detecting,it dont get much easier or better than that