New Tejon Air Test

[Texcavator]

Guys,
I performed an air test and 10" to 11" is about it on a quarter, about 12" on a silver dollar. Is this a normal response?
It is no better than my Garrett 2500 on the air test for coins. Very light weight, .... that I like.
Tell me what you think.

 

[Nauti]

Sounds to me like you are being very honest about your air tests.You hear plenty of air test results that are pure fiction or the tester has used a rubber ruler to measure the distances.I've heard people claim 18" on a quarter....i've tested loads of different machines on a quarter and have never got close to that distance.Your tests seem to be about the average distance that most good machines will attain.Don't forget that the Garrett 2500 is a powerful machine and will keep up with most detectors in an air test.The thing with the tejon is that it won't loose too much depth in the soil and it has a recovery speed advantage over a lot of machines.Overall the Tejon is a top drawer machine.

 

[jeffpa]

Texcavator an air test gives you some info but when you go to the ground it's a whole different story. Ground balance for one I don't believe your getting true depth with an air test and I don't know how the ground balance is affected when the detector is straight out in front as most air tests show, instead of being pointed too the ground. Also the halo effect this is when the item like silver copper ect secretes it's metal or something to that effect around the item. Case in point you get a good hit and after you dig open the hole you get no signal. Then you dig deeper and all the sudden you get a signal again. this is because the halo around the coin has been broken up. and now your getting down to where the item actually is. Even if you dig a hole and bury the coin you still well not be accurate because a halo is formed over time as the coin tarnishes ect. Thats why some folks get a real good signal at great depths of 16 inches or more but I bet if they took that same coin and buried it at 16 inches the signal would be weak or not even signal at all. So to answer your question no there is no normal response it varies on so many things coil size,ground balance, detector, moving the item over the coil at fast or slow speeds can change things. The best way to test one is take two different ones out in the field and hunt for true targets and when you hit a target compaire with the other one. Thats the only way to get a true idea on a detectors performance.

 

[tvr]

How are you set up when you air test? If in discriminate mode, your results are pretty close to mine.

Here is link to Sven's air tests.
Sven's Tejon air tests

His set up #4 is how I set up to hunt most of the time and my Tejon air tests at those settings match his. I have not repeated tests on all the different settings.

Note that in most if not all conditions the Tejon will see a nickle deeper than most anything else. It does do well on the low to mid range conductors.
tvr

 

[bentley1989]

I have a Tejon and my brother has the new Fisher f75LTD.What you have described is what we do.When he gets a signal he thinks is good I check it with mine.He does the same when I get one.Most of the time his graph tells him what my hearing tells me.We both are fooled from time to time.As you said the Halo effect will fool both machines and does.So far he has not found something I can't find.By an air test he will have about 2"on me but we are not digging air are we,Barry.

 

[Tfor2]

I don't have a Tejon here right now to compare results but your test sounds about right. This is very close to my Cutlass II uMax with stock 8" coil.

Usually you can deduct at least 10% of air distance to get ground depth. In our soils here I sometimes deduct 20% or more.

Air distance is the path of least resistance and therefore your maximum possible depth.

The Tejon is like all the other brand machines. All are subject to soil conditions and coil used. The coil is the transmit/receive antenna and it's match to the electronics is crucial. Not all Tesoros of the same model and age are the same. A "hot" machine is one where the coil was very precisely made. The advancement in coil fabrication has been one of the more important upgrades in this hobby.

 

[tvanwho]

Sounds pretty good to me.I can barely get 8 inch air test on my Lobo ST with the 9x8 coil on a silver quarter or the 10 x 12, sam e as is used on the Tejon.But my Lobo can 'see' a baseball size copper nugget at almost 2 feet with the 10 x 12 coil in an air test.

-Tom