Tone volume and PP #'s don't "match"

[Tagamet]

Every now and again (but at least 2 or 3 times on every trip out), I get a high tone signalling a good target, but when I use PP, it reads in the single digits and the volume's increases/decreases don't correlate to the low numbers. In other words, the very low numbers might be going down, while the volume of the tone increases significantly. Also the fact that the PP numbers are single digits seems very wierd. Given my limited experience, the first thing I suspect is that it's a "Not the organ, it's the organist" situation.
Any hypotheses? Has anyone else seen this? Suggestions?
TIA,
Tagamet
PS It's not an issue with the PP button itself.

 

[Mark in NC]

I can think of a few of possibilities, but hopefully the experts will chime in here...

1. maybe a "pocket" of mineralization caused by (among other things) fertilizer. The pocket has hugely different GB than the surrounding soil.
2. a deep "negative" hot rock
3. the edge of a large hunk o' iron (not likely, if I read your question correctly)
4. pinpoint pressed over junk target, then scanned over the real target.

The are just my uneducated guesses...so take 'em as that. If I understand correctly, I've had a similar situation, and it was #4 for me.

HH
Mark in NC

 

[coppersnipe]

Recent similar experiences would make me lean toward Mark's 4th scenario. If it were me, I'd cut a wide plug, flip it back, dig out some dirt, then sweep and/or pinpoint again. Doesn't take much time and at the very least, it would be instructive.

HH,

Rod

 

[Tagamet]

coppersnipe Wrote:
-------------------------------------------------------
> Recent similar experiences would make me lean
> toward Mark's 4th scenario. If it were me, I'd
> cut a wide plug, flip it back, dig out some dirt,
> then sweep and/or pinpoint again. Doesn't take
> much time and at the very least, it would be
> instructive.
> HH,
> Rod

Thanks, I'll have to try that and will report back.
Tagamet