40" x 40" coil for White's TDI

[AlexP]

What can be expected if a large 40" x 40" coil is attached to the White's TDI? Will it work like an ordinary PI such as the Pulse Star II - i.e. it will detect big objects deeper and will become less sensitive to smaller objects?

[AlexP]

Just to make it clearer - I am talking about a DIY coil for the TDI. I know that one can build a coil for this detector easily, but I don't know what to expect. I need it to skip the small objects like nails and coins and only detect bigger objects, as deep or deeper than the standard 12" coil.

[Max]

Just to make it clearer - I am talking about a DIY coil for the TDI. I know that one can build a coil for this detector easily, but I don't know what to expect. I need it to skip the small objects like nails and coins and only detect bigger objects, as deep or deeper than the standard 12" coil.

You forget inductance, resistance, wire diameter... an other factors.

Without these it's like hitting a coke can with a rifle at 1Km.

Some do, but how many ?

You must restrict field and study better the problem there.

[AlexP]

I guess so. Let's say it this way then - is it possible for the White's TDI with a certain type of coil to be turned into an ordinary large-coil PI, like the Pulse Star II?

[Max]

I guess so. Let's say it this way then - is it possible for the White's TDI with a certain type of coil to be turned into an ordinary large-coil PI, like the Pulse Star II?

Hmmmm... I don't know machine details but...

Why not ?

I don't know the word "impossible".

But if you ask me for general user/experimenter ...well I don't know.

Kind regards,
Max

[AlexP]

I guess the only way to find out is to hear from someone who has done it and is so kind to tell the specs of the coil they built and the results they got with it.

[kt315]

new thread is not new subject AlexP. why you so do not wish to follow oldie subject opening new one thinking yours is VERY fresh for all?
http://www.geotech1.com/forums/showthread.php?t=15459

[simonbaker]

What can be expected if a large 40" x 40" coil is attached to the White's TDI? Will it work like an ordinary PI such as the Pulse Star II - i.e. it will detect big objects deeper and will become less sensitive to smaller objects?

Is weather bad or too much arthritis? Why such hard line with AlexP? Link looks useful anyway.

Maybe none of my business... except "dumb" questions is my business...

-SB