Question about single frequency searching

[backeddy]

I am using the spectra v3. Can I search in single frequency and analyze in three frequency with trigger back. I tried to set my detector to do this but got lost in the maze of settings in expert menue....thanks in advance

 

[Rob (IL)]

NO

 

[CyberSage]

Nice use of verbosity there Rob.

This has been talked about in past threads. It is my understanding that unlike the DFX there is no loss of depth on the V3/V3i in multi frequency modes compared to single frequency. The 2.5kHz frequency does do a better job of penetrating mineralization with concentric coils like the Super12.


Here is a 1940's coin spill using the 2.5kHz mode. Look at the Lesche digger all the way in the hole.

 

[Larry (IL)]

I remember reading somewhere from White's that the power used for all three frequencies are concentrated in one frequency mode resulting in more depth. Certainly not three times more, but it is suppost to be noticeably more. Clarification from Anne?

 

[Downdeep]

I know for a fact when testing in my test garden (a penny buried at 10") that single frequency hits better than all three together with similar gain and sensitivity settings. And, on top of that, 7.5 hits best out of the three when running single freqs. presumably because 7.5 hits copper better.

 

[ak_1234]

I remember reading somewhere from White's that the power used for all three frequencies are concentrated in one frequency mode resulting in more depth. Certainly not three times more, but it is suppose to be noticeably more. Clarification from Anne?

Yep. Single frequency will go deeper - all the power is in the single frequency rather than dispersed among the 3.

 

[Larry (IL)]

Thanks Anne, you're a sweetie.............

 

[Rob (IL)]

Sorry for the short answer, internet on the road can suck. Thanks Anne you are the best.

 

[CyberSage]

I remember reading somewhere from White's that the power used for all three frequencies are concentrated in one frequency mode resulting in more depth. Certainly not three times more, but it is suppose to be noticeably more. Clarification from Anne?

Yep. Single frequency will go deeper - all the power is in the single frequency rather than dispersed among the 3.

I assume this depth advantage is due to an optimized wave form in single frequency. The higher the mineralization strength of the soil the less advantage you would see in Single frequency performance compared to multi frequency? Could this be why I am not realizing any depth advantage with my D2 in my moderate soil? Like I said. the Super12 is obviously deeper in Single frequency for me, but not the D2. Any ideas on this Anne?

P.S. I loved your short answer Rob, I am just giving you a hard time.

 

[CyberSage]

I just found my reference. I read it for my soil condition, which is not accurate for you folks with good ground. It was a quote from Jeff Foster. Sorry, my mistake. It makes more sense now...

Re: V3 Vs DFX

There are a number of things in the broader DFX vs V3 category that are worth noting, or perhaps, re-noting as Carl probably hit on most of these points.

First, unlike the DFX, when the V3 is used in multi-frequency mode, it can operate with only a single iron-region ground-balance. On the DFX, in multi-frequency mode, it always uses two ground-balances

 

[Downdeep]

Now thats some interesting information.