F75 setup question...

[MIG73]

Okay, for all you F75 guys out there that have used or still use the T2...I want to set an F75 up to exactly respond like a T2. Can you tell me the equivalent F75 settings for these T2 settings:
Disc mode
Sense:80
Disc:20
Tones: 2+
I've got a really tough site I am going to with a buddy this weekend, and want to set both machines up equally to start off with, as I feel like the T2 will handle the site better. He has NO experience on either machine so I dont want to totally overwhelm him.
Thanks,
Michael

 

[Bill Ladd]

They really mirror each other & sound about the same to me in that set-up. You can read more about this & how it unmasks in iron on the NASA Tom post that Lowrenzo had.....(or maybe someone can paste it here since I was "banned for life")
I love using disc 6 on the F75....good targets really jump out at you in iron as long as you rely on the audio.
So try:
DE process
disc 6
tones 2F
sens. 70-75
(I'm taking a little bit off of the F75 sensitivity as its a bit "hotter" than the T2 & 80 may make it chatter more than the T2).
Good luck & let us know how you guys make out....
Bill

 

[Mark in NC]

Here's info. posted on NASA Tom's site... (giving credit where credit is due )



That 8 minute video is absolutely exacting, 100% correct, no trick-photography; HOWEVER, most detectors can perform this function as long as they have an analog and/or iron adjustable Discrim. .... and preferably has High Resolution Iron Discrimination. The F-75 has adjustable iron Discrim..... and the T-2 has High Resolution Iron Discrim. The F-75's iron range is VDI = 00 - 15. The T-2's iron range is VDI = 00 - 40. Fortunately,,,, on the F-75...... a iron Disc setting of '6' is equiv to a iron Disc setting of approx '20' on the T-2. ((( A F-75 Disc of '7' is equiv of approx Disc '24' on the T-2.... which is TOO much iron disc for 'unmasking' operations ))).

CRITICAL lessons to be learned from this video. I'll use the T-2 for ease of understanding & explanation........ remembering that anything reading up to '40' on the VDI of the T-2 is considered 'ferrous/iron' on the T-2. Let's look at the plyers example. Let's say the iron plyers will give you a VDI reading of.... say; '27' on the T-2. Sooooo..... you place Disc on the T-2 to a setting of '27'. Now you test the half-dollar and generate a VDI reading of '91' on the T-2. The plyers has MUCH greater mass then a half-dollar. But now,,, you compress (electrically connect/ground) the half-dollar to the plyers and wave it in front of the T-2's coil. The COMPOSITE reading of the 2 targets may now generate a VDI reading of.... say; '29'....... which is just above the Disc setting of '27'..... and now the detector audibly reports the 'magic'. Replacing the half-dollar with a U.S. dime..... and now the composite reading of the plyers and dime may VDI read '28'..... and the detector reports "target above Discrim setting". ---Keep in mind that the plyers has MUCH greater mass over a U.S. dime; hence, the VDI reading does not climb very much when the two targets are grounded together. It does not matter if the coin is in front.... or behind the plyers,,,,, as long as the two objects are touching each other. And it's a guarantee that the detector in the video did NOT ID the composite targets as; "coin".
THE REAL TEST WOULD BE TO HOLD A SLIGHT AIR-GAP (less than 1") BETWEEN THE TWO TARGETS..... and wave them in front of the coil. No detector will succeed in detecting the coin. 3D seperation/displacement of 2 objects is a entirely different world of results. And in the real world.... most masked targets ARE NOT electrically grounded (touching) each other.

Now........... the video demonstration using the iron (small) cannon ball. The CRITICAL thing to witness here is: ... the requirement to RE-adjust the iron Disc setting,,,,,...... then (and only then) can the rest of the test/demo be performed as described above.....,,,,, having identical performance results. When hunting in the real world....... you can not keep RE-adjusting the Disc setting for each scenario in the dirt,,,,,, as you have no idea of what specific scenario is under the coil at any given moment. FORTUNATELY; most places we detect..... there are not thousands of plyers and other large iron objects in the dirt; HOWEVER, there are thousands of nails........ which can be easily "hair-split" Disc'd out,,,,,,,,........ allowing you the ability to somewhat 'unmask' good targets out of the iron.

This video does reinforce the requirement and the CRITICALITY of having a Disc setting of '6' on the F-75..... and a Disc setting of '21' on the T-2... in nail infested sites.

Sincerely,

Tom