Why a discriminating PI?

[ma330]

LF358

hello paul:
exist not ic LF358 . end this serial is LF357 . ok
mean your is LF357 ? or other things?
LF356 or LF357 is similar for TLC2262 ?
tank you . wait for you.good nice

[Ferric Toes]

the GS5b properly ground balanced you do NOT get any audible signals on magnetic minerals that "mimic" metallic conductive targets" the only exception I am informed is charcoal in some cases.
ElectroNovice

From my experience, charcoal of itself is not detectable. It's conductivity is too low. However, where charcoal appears to be detected, it is the result of heat from the fire having converted magnetite in the soil or rock, to the much more magnetically viscous maghemite. Again, this is well documented in archaeological survey literature, as the effect is used to locate ancient habitation sites. Where there has been a pottery kiln, fire hearth, or even stubble and bush burning, the ground in the immediate vicinity gives more signal than ground that has not been subjected to high temperatures. So, if you get a localised signal from the ground, and you dig up charcoal, it is likely that someones campfire has enhanced the magnetic ground effect in that spot.

Ferric Toes.

[Paul]

Its good to see Eric join in this discussion because my friend paul he has forgotten more about EM and Pi than you obviously know!

You're a waist of my time. I already told you to first learn some basic physics then we'll talk. And stop pretending that knew that when your other posts clearly demonstrated you did not.

Paul

[Paul]

the GS5b properly ground balanced you do NOT get any audible signals on magnetic minerals that "mimic" metallic conductive targets" the only exception I am informed is charcoal in some cases.
ElectroNovice

From my experience, charcoal of itself is not detectable. It's conductivity is too low. However, where charcoal appears to be detected, it is the result of heat from the fire having converted magnetite in the soil or rock, to the much more magnetically viscous maghemite. Again, this is well documented in archaeological survey literature, as the effect is used to locate ancient habitation sites. Where there has been a pottery kiln, fire hearth, or even stubble and bush burning, the ground in the immediate vicinity gives more signal than ground that has not been subjected to high temperatures. So, if you get a localised signal from the ground, and you dig up charcoal, it is likely that someones campfire has enhanced the magnetic ground effect in that spot.

Ferric Toes.

LOL, that's a good catch Ferric Toes. I didn't even read up to that part of ElectroNovice's post to see that. LOL, now that is hilarious ... signals from charcoal. Listen ElectroNovice, I try to be compassionate, ok sometimes failing miserably, but please first learn some basic physics. In just about every post I have to correct your obvious physics errors and then you come back pretending that you knew that. What's your deal brother?

Paul

[ElectroNovice]

LOL, that's a good catch Ferric Toes. I didn't even read up to that part of ElectroNovice's post to see that. LOL, now that is hilarious ... signals from charcoal. Listen ElectroNovice, I try to be compassionate, ok sometimes failing miserably, but please first learn some basic physics. In just about every post I have to correct your obvious physics errors and then you come back pretending that you knew that. What's your deal brother?

Paul

Apologies to Carl the moderator and forum members for the following post.

Paul your post CLEARLY shows that you have never done any detecting of any significance. When there has been bushfires in Oz it is common to get a signal around some trees which when you investigate you commonly dig up or find burnt tree roots underground which when removed the signal is gone. On some of these burnt tree roots they DO give a signal when passed across the Pi coil particularly when they are damp. The signals are NOT due in many cases to any apparent metallic material and dissappear when the burnt roots are crushed. Have you ever detected in Oz after a bushfire?

And please stop trying to evade my questions by intellectually trying to intimidate me.You are NOT the font of all EM knowledge and if i was so inclined to spend the time going through the hundreds of papers I have I could easily demonstrate this fact. I by the way am not a physicist just an average bloke who joined this forum to learn more about electronics and em from those that know.I do get upset however when an upstart, know it all EM "expert' like you comes along and has the hide to attack the likes of Eric Foster who is immensly respected and is truly the godfather of Pi.Not content with this you then attack the credibility of Reg Sniff and Dave Emery who I feel now won't waste their time responding to you because you know it all and they are wrong.Talk is cheap my friend.When you have established their track record and even acquire a miniscule amount of their Pi knowledge and built a better Pi than them, then you you might be treated with respect and taken seriously.Until then I suggest you take your your drivel elsewhere.
ElectroNovice

[Paul]

ElectroNovice, I really want to stop conversing with you. You catch me on that I read the first few sentences of your post, but that is all. No idea what else you said, but please stop warping everything. Listen guy, I clearly used JP as an example of a full-time detectorists in Australia. Now you keep blowing it up, reading between the lines, and babbling on and on. Give it up and save yourself a world of stress.

Paul

[willy]

Evidently your word isn't worth much

Paul. Thought you wouldn't read, much less reply to my posts; just goes to show that some people cannot keep their word. Personally, judging from what I've read so far, you seem to be just "trolling". It's a rather pathetic way of trying to seek attention, but whatever. A logical dissection of your posts (and how you interpret other posts) does not speak well for you and your analytical abilities. Hopefully, and I'm speaking to others on the forum now, people can nip this rather pointless exercise by just not responding to Paul's posts. Then again, who knows, some people truly enjoy debate without reciprocal reasoned discourse. The LRL forum is a great place to obtain a bellyful of that. ..Willy.

[willy]

My mistake..

The remote sensing forum.. Willy.

[ma330]

hello to all:
please send for me similar ic for TLC2262 in bandido IIumax.Because Exist not ic LF358. end number in this serial is LF357 i make this metal detector but not found this ic (TLC2262). i posit ic 5532 Replace
mc33178 is Feasible??????? Thick And Thin please help to me .
please send to my [email protected]

tank you. good nice. good byyyyyyyyyyyy

[Paul]

Paul. Thought you wouldn't read, much less reply to my posts; just goes to show that some people cannot keep their word.

There you go with your totally fuzzy logic mentality. Show me one place where I gave my word. Again, it's the top few sentences that catch me.

I'll try to have compassion for you, but I really have to laugh now that you're grasping at anything just to try and hurt me, LOL. Come on guy, you really think your comments can hurt people? Anyhow, just learn some basic physics first.

Paul

[robby_h]

Candy's original Australian patent describes his pi discrimination method as sampling the magnetic effect during pulse-on and comparing this with samples taken at a suitable or comparable time after switch off. I can only assume Dave's method is noticably different and so doesn't breach Candy's patent?
The number of patents out there that appear almost identicle makes me wonder whether the examiners even care and simply just leave it up to the parties to sort this one out.