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DeepTech

Question on frequencies...MONTE help would be appreciated or anyone else who can explain

A

Anonymous

Guest
The 1266x is touted as a relic machine. I am to understand that the lower freq. is better suited to the higher conductive metals such as silver and copper...yet we very often hear that the 1266x is a relic machine and not a coin machine. I realize this is a Tesoro forum so here is where the Tesoro part comes in... Seems like all the new high freq machines (x5, tejon) are great on nickels which are of the lower conductive metal as opposed to silver and copper. You hear of the 15 and 16 inches on a bullet, a nickel, but never on a quater or a dime or penny...what gives? What machine would be better to coin shooting the Tejon or the 1266x. Cansome one shed some light on this. I asked a very similar questionon the Fisher forum also.
 
Frequency is not nearly as critical to the detection of targets as is the method of operation of the motion discriminate circuits. The difference in coupling from 5 KHz to 15 KHz is minimal. The way the synchronous demodulator for the motion discriminate is configured has major effects on targets in the middle of the detection range, such as nickels. That is why machines vary, not the frequency they operate at.
 
I went bark chipping in a playground yesterday and took my little Tesoro Compadre and picked up about three bucks which included 10 nickels. Some were down eight plus inches. The Compadre is a nickel magnet.
Bill
 
One more time but in English Jack. <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> Isn't it true though that higher operating frequencies are more sensitive to small objects and gold.
Bill
 
<body background="http://www.wiredcafe.net/jbms/tesorobg1.jpg">That's why there's so many 5 khz detectors made for hunting small gold nuggets <img src="/metal/html/tongue.gif" border=0 width=15 height=15 alt=":b">.
JB
 
Higher frequencies increase the coupling or sensitivity to every item, including small items, gold and mineralization. If frequency was the only thing to consider, we would all still make 100 KHz detectors, wouldn't we? The lower frequencies decrease ground coupling, but also decrease coupling to targets. Higher frequencies increase coupling to both. Designers must choose the compromised frequency window they want their design to work in. Metal detectors used to work around 100 KHz, then were lowered to about 2 KHz with the first ground balanced detectors. Neither frequency was optimum. The majority of detectors sold today probably work within the 5 to 15 KHz range, for good reason. And the difference of coupling to gold targets or small targets is minimal at these frequencies. The circuit gain and configuration have much greater effect than frequency.
 
Maybe someones marketing hype has gotten to you. The circuit parameters of gold detectors are considerably different than detectors designed for general purpose use, which was the type detector the original question referred to. Frequency has only a very minimal effect. If higher frequencies were best for finding gold, why don't we have a 1 MHZ gold detector? Or even higher?
 
It has been my feelings for many years that, all too often, folks read something in print and take it as 100% factual.
While there is a little bit of fact to the frequency issue, as Jack pointed out it is much more how the circuitry is designed to work.
But to your latter question with regard to selecting between the 4.8 kHz 1266-X or the 17.5 kHz Tej
 
Nope, been around too long and involved with detectors too long to fall for hype. I know that frequency alone isn't the deciding factor, but given the circuitry currently being used in consumer hand held detectors a detector with an operating frequency of 17.2 khz will be more sensitive to small low conductive targets than a detector with a frequency of 5 khz.
JB
 
Which I never use, if possible why not design a dual demodulator machine if it would help out on the higher conductors as well. One position for the nickel range and one keyed for the higher conductors? Seems to me if this was possible it would be a good thing.
Now that would make a great dual purpose machine.
Tom
 
....if frequency is of such minimal effect, why dont we have gold machines operate in the 2 to 6 KHZ range?
 
Jack
Pay no attention to these 2 clowns posting below. From their frequent post on other forums they have no clue about electrical circuit theory of metal detectors.
They haven
 
looks like you have a new handle...The dime clown. <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol">
HH, the TROLL
 
Hey Jbird, looks like Pilgrim found us out <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">.
JB
 
35 years experience as a user, sometimes dealer and trader, and have had the opportunity to try almost every land detector made since 1985 plus many of the old TR's, BFO's and early VLF's. Been on the forums since January of 1995 when Tnet was the only detecting forum. Jbird has been around almost as long. Clowns? Not by a long shot sonny.
JB
 
Don't pay no attention to that guy. Your one of the few on any of the forums who always tell it straight and some of us appreciate it.
 
Finally recieving a little recognition <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
 
But life will be different now in the spotlight after being specially annointed by an expert at making clownish remarks.
 
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