northwest vlf vs pi??
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australian electronic gold prospecting forum.com  |  VLF detectors  |  Vlf metal detectors  |  Topic: vlf vs pi?? 0 Members and 1 Guest are viewing this topic. « previous next »
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cliffy
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« on: February 03, 2011, 07:31:48 PM »
Sorry if this is a silly question, but I've been reading a lot of topics on your forum about pi detectors.
As I mainly work beaches (living in Kiama) which format would I be better off getting, pi or vlf? and why?

I have not been gold detecting yet though I will one day. Have done some panning though.

Thanks,
john
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WM6
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« Reply #1 on: February 03, 2011, 08:31:48 PM »
Quote from: cliffy on February 03, 2011, 07:31:48 PM

As I mainly work beaches (living in Kiama) which format would I be better off getting, pi or vlf? and why?


Depend on how much metallic trash you can find on beaches there.
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mikebg
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« Reply #2 on: June 17, 2011, 05:22:46 AM »
Quote from: WM6 on February 03, 2011, 08:31:48 PM
Quote from: cliffy on February 03, 2011, 07:31:48 PM

As I mainly work beaches (living in Kiama) which format would I be better off getting, pi or vlf? and why?


Depend on how much metallic trash you can find on beaches there.

If there is lot of trash, VLF or PI?
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WM6
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« Reply #3 on: June 17, 2011, 07:48:16 AM »
Quote from: mikebg on June 17, 2011, 05:22:46 AM


If there is lot of trash, VLF or PI?

[/quote]

Those which has better discrimination, better notch filter and better recovery speed. And again depend of what you are searching for (gold jewellery, coins, gold nugget, relic, old militaria)

Huge trash request small coil too, no more than 8".
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krokdundee
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« Reply #4 on: June 17, 2011, 03:35:13 PM »
Hi John
multi tone vlf, the trick on the beach is speed, on the drye part only dig the high tones
on the wet part, dig everything.
On the wet salty part there are only a few vlf detetors you can use, like the minelab excalibur or the sovereign serie's
or a fisher cz serie.
regarts
Gerrit
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mikebg
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« Reply #5 on: June 17, 2011, 08:36:00 PM »
Quote from: krokdundee on June 17, 2011, 03:35:13 PM
Hi John
multi tone vlf, the trick on the beach is speed, on the drye part only dig the high tones
on the wet part, dig everything.
On the wet salty part there are only a few vlf detetors you can use, like the minelab excalibur or the sovereign serie's
or a fisher cz serie.
regarts
Gerrit
Gerrit, for Excalibur, Sovereign and Fisher CZ is not suitable the term VLF, because this term is used only for single frequency metal detectors. The mentioned three models are multi frequency metal detectors and even their lowest operating frequency appears below VLF radio band (below 3kHz). This is in ELF radio band. However, the classification is not so important. More important is for us to know that multifrequency metal detectors are suitable for beach combing.
Thanks for sharing your experience.
Here near Bulgaria, we have the Black Sea which water contains twice less salt concentration than worlds ocean. Maybe for this reason not only multifrequency detectors operate well. Most VLF metal detectors use DISC control instead GND control to eliminate GND signal in salty beach.
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krokdundee
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« Reply #6 on: June 17, 2011, 09:30:18 PM »
Hi mikebg
You wrigh about the multi frequenz detectors
Butt 8 out off 10 vlf detectors you can't use them on the salty wet part off the beach,
you have to back off your sensetivety that much, you bether stay home and have a beer.
Latly we only do fresh water in the half off Europe and then its no problem to use a vlf detector like tesoro or detector pro
if we find a good detector for land, we wil waterproof it.
Regarts
Gerrit
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