Did the low/high discrimination depth test,

[Old California]

My friend Jim has a test bed we use for our detectors, Ranging from 6" to 11" inches. Please remember this is California soil so we don't get the same depth results many others achieve back east. Plus, Our mineralization ranges from fair to extremely bad depending on location. Several of the detectors that do well back east operate with poor stability here in the West coast.

After a proper fast grab GB using the disc mode on the T-2, Sensitivity set at 75 with discrimination at 10 and using the two-tone feature had a hard time responding too the 10" buried penny, That was the maximum sens I could operate the T-2 without the unit showing signs of poor stability. Moving on to the 9" buried penny then the T-2 could easily detect the 9" buried coin.....Not a strong signal but a good repeatable signal....So the 9" inch buried penny was the coin used to compare the on/off discrimination depth comparison.

Then, Cranked up the discrimination up to 80 "maximum" using the same sens, same two-tone feature and did another proper fast grab GB. My friend Jim was there beside me and we both carefully had our ears tuned for the slightest difference on response between the two comparisons. Back and forth we switched from low disc to max disc sweeping the coil back and forth using the same speed with each setting, Back and forth and each time both of us noticed the same when using max discrimination the signal was weaker, Not the same crisp signal with using low discrimination.

If anyone else can perform the same type or similar test with buried coins please share with the forum, I'd like too see other results.

HH, Paul (Ca)

 

[coenwolf]

n/t

 

[Low-Boy/LCPM]

I would think the T2 at 80 disc might lose some depth, on my T2 in my Calif soil it picked up wheat's at nine inches and the tone was a bit weak but hey 9 inches is nine inches and as Paul has said he uses a high disc to cherry pick parks that are loaded with trash, so he is not looking for depth.

Now a lot of us use disc ten - twenty one on the T2. I think a more fair test would be test it at say 40-45 and see if it loses depth. The T2 is at its best a relic machine and most users are going to want to hear the iron so disc is not a factor.

I would take the T2 and test it with another brand and find a disc that are on par for both machines and see which machine loses more depth.

 

[JM]

Good post Paul,we know some modes are not has deep has others ,I would like to see a test using 1 -1+ also how high the discrim can be pushed before signal quitens down ,got to admit sens is very low really at 75 ,but thanks for your test .

 

[Old California]

Hi John,

That's a good idea, Later on in the week I'll try each of the tone settings starting with the 1 to see/hear which ones react different including the visual ID.

For my area, 75 sensitivity is high and some of the surrounding areas I can go higher but for this particular location that was the highest I could go without the machine going nuts, 75 sens with the T-2 at this test bed area was pretty smooth, Even other detectors including the Explorer go bananas with too much sens at this test bed area. Something nearby causes allot of interference.

Thnaks John,
Paul

 

[Old California]

Good idea,

Ill try a lower disc setting....Most likely, using low disc will not create the same weak response as it did using the maximum disc. I'll try this out in a few days.

Thanks,
Paul

 

[MattR]

Hi there Paul!

What are you doing with water in your bottle?

How about filling it with some of my favorite 'anti-freeze' instead....Southern Comfort.
Now that'll keep the frost off your tootsies.

Seriously now Paul, if you get a chance to run a T2 over that test bed can you make a note of the numerical variations when each coin is scanned several times. i.e:-

Penny at 6 inches... 75, 80, 70, ( or whatever it is on a penny)
Penny at 8 inches... 72, 77, 79,
Penny at 11 inches.. 61, 70, 59,

Repeat tests at 3 different levels of discrim. 10, 40, 70.

Also, please provide a Ground Phase reading of the area, and sense levels.

The aim being to try and obtain some indication of the numerical 'band-width' (variations of several sweeps) of the same target at various depths.

Hopefully, it may illustrate why we have this apparent 'loss of depth' or loss of audio

 

[Frank in NH]

n/t

 

[JM]

Here in the UK ,we need to use discrim from about 41 upwards so has not to miss thin gold rings and the start off hammered coins ,any loss off signal would be minimal if any at all, going to full discrim would not be in our interest, for finding out very thin hammered coinage.I notice Paul your test bed is close to a building ,and concrete slabs are very close by, could that possible alter the ground readings at all, as you sweep your detector coil.

 

[BTaylor]

Hi Paul,

I realize you have not used the X-70 as long as you have your T2. How would you compare the T2 to the X-70 as a coin detector? I know you really like the T2 as a relic machine.

I use my T2 primarily for coin-shooting here in Virginia, and it does a very good job. I my try my hand at relic hunting in the near future. Civil War sites that are not on government land are readily available to me without must trouble.

The T2 is so easy to use and setup, that it is hard for me to invest in another detector that is not a great deal better than the T2.

The next detector I purchase will most likely be a F75, which I consider a T3 in disguise. The X-70 is an option if the F75 does not live up to all the hype. Besides a new X-70 can be purchased for a lot less than the price of a new F75.

As I have state in my last email to you, a smaller coil would be nice for either of the before mentioned detectors! Reply when you have time.

Thanks, Bill

 

[Eddie Currents]

Would love to see more tests like this.

Thanks,
EC

 

[coenwolf]

n/t

 

[JM]

n/t

 

[MattR]

n/t

 

[Cody]

MattR, chunking rocks at the moon. Don't waste your time!

 

[Old California]

Hi Bill,

As a coin detector, I favor the T-2 for quick clad over the X-70. Using the 3b mode for fast clad is dynamite!

For deep park silver, Both fare about the same. Both are subject to smaller pieces of aluminum or other pieces of trash fooling the user when searching for deep coins at an old park or school. Both detectors are very sensitivity so it's common for detectors such as these to respond strongly to smaller targets.

For relic hunting, I favor the T-2. Not saying the X-70 is a bad relic detector it's just the T-2 has an edge. With the T-2, weaker or masked signals jump out.

For gold jewelry, the X-70 has an edge and that's because when using the 6X10" 18.75 DD coil the smaller gold chains and nuggets come in crisper. The smaller 18.75 kHz DD coil is the reason for this advantage. The T-2 has the capability of hitting those gold chains as strong as the X-70 but it's going to take a smaller coil to achieve the same sharpness response as the X-70.

When the smaller coil comes out for the T-2, This should improve the smaller nugget size targets and improved sensitivity to gold chains. Can't wait for the smaller coil

Thanks Bill,
Paul (Ca)

 

[Old California]

Hi Frank,

Yes, My T-2 has the current R6 revision.

Sent it in back in july, Had a turn around time of one week.

HH, Paul (Ca)

 

[Old California]

Sounds good Matt,

I'll try the T-2 out again at this same test bed with the settings you enclosed in your reply, Give me about a week.

Thanks and good hunting,
Paul

 

[Old California]

Hi John,

Although it appears the concrete may interfere with the buried pennies, The concrete sidewalk actually doesn't. What does interfere is a nearby power source that interferes with most detectors we test here, So we can not operate most detectors with a high sensitivity.

Thanks and looking forward to viewing more of your finds,
HH, Paul

 

[JM]