ctx3030 strange sound on coins

maxxkatt

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Joined

Sep 20, 2015

Messages

3,588

Location

North Atlanta, GA

• Nov 15, 2021

• #1

I am using the CTX3030 US Coins Pattern - FE-coin/gnd-coin. in Andy's Sabisch's book on page 114. In my hunting area it is very good at filtering and identifying US coins. But on some there coins there is a small thunk sound after the high tone. I was wondering if that indicates anything important.

 

Rattlehead

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Joined

Jan 9, 2012

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4,937

Location

Cave Spring, GA USA

• Nov 15, 2021

• #2

The FBS "thunk" sound usually indicates a target right on the edge of the detector's depth range. Here's a good thread on it:
https://metaldetectingforum.com/showthread.php?t=231361

 

D

dumbdigger

Elite Member

Joined

Feb 20, 2013

Messages

1,380

• Nov 16, 2021

• #3

It means dig!!