HH controls?

[Nc-Dirty-digger]

i new here and im sure this is a stupid question but i have to ask. what kind of controls does the HH1 have?and would it be a good choice for relic hunting with a 13in coil?i am interested in trying to build this project but would like some input a what rev. to use. just remember i am new to this

[homefire]

Have you read the article?

http://www.geotech1.com/cgi-bin/page...head/index.dat

[Nc-Dirty-digger]

yes i did. but as i said i am new at this and seen some pictures in another post in the forums and all of them looked as if they had a few controls. and i was wondering what all the controls, controled.thanks for your reply

[Carl-NC]

The controls are up to you. As a minimum, I like threshold and sample delay.

[Nc-Dirty-digger]

is your HH1 capable of ground balancing

[Carl-NC]

No, it does not have a GB circuit.

[msysta]

Carl,

Im confused as usual...

How does ground balancing circuit differ from the autotrack functionality that HH has?

thanks,
Markus

[Carl-NC]

HH has SAT, not true ground balancing.

[grungymike]

switches and knobs...

Hi, I've been working on a Hammerhead design myself, chased my tail in circles trying to decide what controls to put on the box. Finally decided on VSAT, threshold, gain,
sample pulse width, and 1st and 2nd sample pulse delays. This is probably overkill but will allow me to do some serious field testing to see what effect each adjustment has under working conditions.

A coupla thoughts, having 1st delay handy allows for a poor man's ferrous discrimination, if you extend the delay and the target's still there it's probably iron, if it dissapears it could well be a non-ferrous target.

However, no discrimination system is perfect, the rule of thumb for nugget shooting is when in doubt, DIG!!!

The 2nd sample acts as a ground signal baseline (gets subtracted from 1st sample, leaving target portion of signal). I think this could be a useful adjustment, not as a ground balance, but a ground signal filter.

Attached is a really good 2 part article in pdf format about pulse induction theory and operation. It taught me a whole lot about how these contraptions are supposed to work.

gm

[Qiaozhi]

You forgot the attachment.

[grungymike]

oops...

My blunder, they're MHTML's, not a file type supported as an attachment. I tried copy/pasting the URL but I don't trust the result I got (6 lines of chicken scratches). Also tried a pdf conversion, it didn't work out so well either.

The articles are on the deeptech website. If you google Reg Sniff you'll get two results titled "Understanding the PI detector", and "Understanding the PI detector(part 2)". Those are the targets, it's a 2 part (2 files) article on the theory behind PI.

Sorry 'bout that, guess I've gotten spoiled by the .pdf format...

gm

[Qiaozhi]

My blunder, they're MHTML's, not a file type supported as an attachment. I tried copy/pasting the URL but I don't trust the result I got (6 lines of chicken scratches). Also tried a pdf conversion, it didn't work out so well either.

The articles are on the deeptech website. If you google Reg Sniff you'll get two results titled "Understanding the PI detector", and "Understanding the PI detector(part 2)". Those are the targets, it's a 2 part (2 files) article on the theory behind PI.

Sorry 'bout that, guess I've gotten spoiled by the .pdf format...

gm

Try zipping the files and then attaching.

[SVEN1]

Understanding the PI detector

Here's the .pdf file