Monte, could this duplicate the "homestead rock"....

[slingshot]

After power ground balancing my Silver umax and Compadre, I started picking up some signals in the pebble area of a school tot lot and finally found a black rock about the size of a quarter. Taking it back home, I tested it in a/m mode with my Royal Sabre, which I believe you said had the true a/m mode. The threshhold immediately went into the null, so I surmised I had set both too far negative. Turning the pot ccw, the rock quit making signals. With the Compadre, I could null out the rock as I did with the Royal and a penny would still be found under it, as with the Silver umax. Turning the Silver umax to min. disc. instead of a/m, the penny could still be heard, albeit with a more broken sound. I'm hoping I've found my Homestead rock.

 

[jbow]

n/t

 

[slingshot]

n/t

Sorry about that. I guess Monte opted not to answer my question. In his numerous hunt sites, Monte came across a rock that basically blocked or target masked detected targets. By using it as a guide to set his ground balance feature, he was able to find a lot of targets that other detectors would miss. I've thought this through and apparently what I've found is more or less a rock with properties close to negative ground and I had just "power ground balanced" my Compadre and Silver umax a little too far into the negative side. By turning the trim pots a little more positive, this rock quit giving a signal and starting acting like it did with my Royal Sabre, which has a true a/m mode when in pinpoint. Anyhow, the detectors have both smoothed out and are quiter and the depth seems to be there.

 

[jbow]

That is interesting. I usually GB slightly positive for my ground.

Thanks,

Julien

 

[slingshot]

That is interesting. I usually GB slightly positive for my ground.

Thanks,

Julien

Yeah, most do. The thing about the Tesoroes WITHOUT g/b controls is that whenever the g/b is normal it is automatically slightly positive in the disc. mode. So the trick is to power ground balance so that you end up with the disc mode slightly positive or close thereabouts. So when you bob the coil and adjust the trimmer care must be taken not to go too far one way or another-which is apparently what I did. I think I found the perfect rock since it shows negative under the coil with a true a/m mode and when I adjusted the trimmer to the point that the rock JUST blanked out, I was about as close as possible to getting it right in disc mode. But I guess I'll never know-all I know is that they've both quieted down and depth is very good.

 

[BarberBill]

I've thought for years that a slightly positive GB was the way to go, but have run into numerous posts by very experienced users that mention that in some instances slightly negative is actually preferable. I'm not really sure as how to decide when to use one over the other, maybe someone will chime in on this.
BB

 

[slingshot]

I've thought for years that a slightly positive GB was the way to go, but have run into numerous posts by very experienced users that mention that in some instances slightly negative is actually preferable. I'm not really sure as how to decide when to use one over the other, maybe someone will chime in on this.
BB[/quote
I do know that if a Tesoro is too positive, quarters and halves will not be picked up as well as before going too positive. In some instances, they didn't give a signal!

 

[Ism]

I have neutral soil where I live and slightly negative GB seems to false a lot more. Results may be different elsewhere.

 

[slingshot]

I have neutral soil where I live and slightly negative GB seems to false a lot more. Results may be different elsewhere.

Yeah-that's what was happening in some of my areas and this rock was also being picked up and should have sent the signal in the null.