Spectra V3 / V3i / VX3 Forum

Larry I have got to tell ya .Here in maine those 83/84's that aren't green are large cents !!!!! I do think of you and Rob every time Large cent or bottle cap Bill

I will have to check that out Bill, but we are not blessed with a lot of LC's here in the Midwest. I have found two in the last 30 years.

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Bells and whistles are nice, but nothing will substitute for the basic understanding of the hobby.

CTX 3030, V3i, M6 W/Bigfoot coil, Cibola/modified

And I have only one. I remember walking up to Larry and asking," What's this?"

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"Everyone has an opinion, but mine is free"
"You might very well think that; I couldn't possibly comment..."

Howdy--

I thought that I would have to chime in on this one. A recent inquiry by Supafly spurred me to perform a few air tests of my own. I must admit that some of the results on gold coins surprised me. So I conducted a few more tests and I thought that I would share them.

Using the V3i, in the Coin Mode, with the D2 Coil and the settings of: RX 1, AM 55 and Disc 55, I had these results:

$1 Gold (Types 1,2 & 3) VDI......14-16......Dominant Frequency.....22.5 KHz
$2.5 Gold (Lib & Ind) VDI......33-35......Dominant Frequency......7.5 KHz
$3 Gold VDI......35-37......Dominant Frequency......7.5 KHz
$5 Gold (Lib & Ind) VDI......49-50......Dominant Frequency......7.5 KHz
$10 Gold (Lib & Ind) VDI......54-58......Dominant Frequency......7.5 KHz
$20 Gold (Lib & St. G) VDI......74-75......Dominant Frequency......2.5 KHz
$50 Gold Buffalo .9999 VDI......87-89.....Dominant Frequency.......2.5 KHz

All coins are either PCGS or NGC slabbed. I don't know what , if any, influence the incapsulation had on any of these readings.

Hopefully this information will put a Gold Coin in your pouch!

Happy Hunting
Blind Squirrel

fantastic info Squirrel!!

thx

Now that is funny, I remember that..........

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Bells and whistles are nice, but nothing will substitute for the basic understanding of the hobby.

CTX 3030, V3i, M6 W/Bigfoot coil, Cibola/modified

Just curious..... why is the dominant frequency mostly 7.5 kHz and even one 2.5 kHz? I thought gold was supposed to hit the high frequency (22.5 kHz) the hardest. When hunting old fair ground parking lots, I would only dig targets on the low end of the positive VDI range if 22.5 kHz dominated... figuring it was possibly deep gold. Guess I need to rethink my thought process.

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Happy hunting - Schultzie

Dominate frequency is determined by conductivity AND mass. .

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Bells and whistles are nice, but nothing will substitute for the basic understanding of the hobby.

CTX 3030, V3i, M6 W/Bigfoot coil, Cibola/modified

Quote
Larry (IL)
Dominate frequency is determined by conductivity AND mass. .

Larry is correct. Most of the gold rings I have found have come in on the 7.5 frequency. Very few on the 22.5. No gold on the 2.5 frequency.
Remember that gold rings isn't pure and the kt. will vary. So will the size which will effect which frequency hits hardest.
If its shallow, (above 4 inches) VDI consistency at different angles is a good indication of a ring. Changing vdi's will usually be junk. But remember nothing is 100%.

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Indianapolis In.
Whites VISION (V3)
Whites V3i
Whites DFX
Author of METAL DETECTING BOOT CAMP