F70 freqency choices

[markg]

Since the F70 runs at 13kHz, what are the other 6 frequencies?
The manual states, ground balance must be redone after changing frequency.
But what are the other frequencies?

 

[Dan-Pa.]

I really don't know but from using other units with freq. change ability was always advised to use the default which in this case is F4...Along the way have read the F75 runs a tad better on F7 so a call to Fisher and talking with a Tech. would be my advise..Main reason for the change of freq. options are for planted hunts or to work better in some areas due to outside electrical interference. As an example when two of my nieces neighbors use their beepers to open or lock their cars her doorbell goes off so go figure...
I always try to use the default of F4 if possible and would imagine from F1 to F7 not much change in the frequency but just enough to work for the above examples..

 

[Streak!]

with just a few HZ difference from one to the next. you often dont need much of a difference to make a difference.(with interference that is) when we used Tesoros at comp hunts a few years back............you'd find a lot of machines that despite being the same freq, wouldnt interfere at all..due to drift and inconstencies with the freq generator the machines use. I remember one guy in particular whos machine wouldnt hardly ever interfere with mine till the ambient temp went over 90. THEN he interfered like crazy!!
Contrary to what you might read here and there.........I dont think that changing the freq will have any real effect on performance at all...UNLESS your getting interference from another unit..or a RF source.than changing up a bit might make a world of difference!! Streak!

 

[markg]

I guess I was just hoping the frequencies were a lot different.
Hey that would ba a great idea for a new machine.
6kHz for silver
13kHz for the middle
18kHz for gold
Then you could switch depending on what you were hunting for.

 

[Digger]

Although that is a great idea, it is not a new idea. There are several detectors in the marketplace that have the capability of changing their operational frequency. Not just within the range of a kHz or two, used by many manufacturers in an effort to offset interference factors. But some who's frequency varies much more, allowing more sensitivty to various conductivity levels. Some detectors (e.g. CZ, Explorer, DFX, Sovereign) operate at more than one frequency similtaneously. Some (e.g. DFX) allow the user to switch frequency via programming changes within the detector settings. And another (X-Terra) allows you to change frequency by simply changing the coil. And regardless of what some may think, targets with different conductivity levels do respond better to different frequencies. That is why most "gold detectors" operate at much higher frequencies than those thought of to be primarily relic or coin detectors. JMHO HH Randy

 

[Dan-Pa.]

Years ago watching a video and one of the hobbies top men saying if you and your buddy go out have him change frequency as usually the default should work better...
And why doubt the experts and of course planted hunts don't matter as targets are shallow...

 

[Streak!]

my statement... " I dont think that changing the freq will have any real effect on performance at all" was used in the context of the discussion....which was the incremental differences when using the freq shifter on various machines..............NOT the much bigger differences in freqs available in current detectors. Its common knowledge that higher freqs favor low conductors ( Gold machines with 100MZ operating freqs) and lower freq machines tend to favor bigger, higher conductive targets ( like the older Whites 3KHZ coinmaster machines!).
Most manufacturers tend to try to achive a good balance, to make their machines more sensitive to a wide array of targets, but the latest advances in digital processing have narrowed that gap. The DE/JE processes on the F75 are a classic example of that. With a simple flick of the switch....the F75 becomes much more sensitive to low conductors.... by signal processing alone. The Shadow X5 (another Dave Johnson Design) achived good response to deep coinage as well.....despite its relatively high 19KHZ operating freq..........again through signal processing .
That particular statement about those incremental changes in freq was in response to something going around on the web that said... in essence, that the F75 works better when set on its highest freq setting. Again.....I dont think THAT will make a lick of difference..... UNLESS someone is experiencing a bit of outsite interference....and changing the freq up a bit helps minimize or eliminate it. THEN, and only then might it make a measurable difference.

Sorry I didnt make my statement clearer in my origonal post............................ Streak!

 

[Streak!]

the " default " setting is the Default setting for a reason. Its likely what the engineers consider the optimal setting for the machine in question. Thats when your comparing apple to apples though...and there are no extenuating circumstances or outside variables to consider. Good point!!!! Streak!

 

[BJ in Okla.]

There was one made back in the 90's by Compass,... I had one with 2 coils and wished that I still had it... Below is a copy & paste from Andy's field test.......on the Compass X-200 Challenger.
Dan, you may remember George F. in NY,,,that who I got it from...
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

The X-200 Challenger is a manual ground balance, full-time target ID detector with three independent search modes. These include a true non-motion All-Metal, a motion dis

 

[BarnacleBill]

Already exists Minelab X-Terra 70, three coil frequencies in various sizes and configurations, 3KHz, 7.5KHz, 18.75KHz. The trend lately by various manufacturers seems to be towards a slot in the 7.5KHz to 8KHz region as a compromise. How about a light weight CZ with switchable 5KHz, 15KHz, or the dual 5KHz & 15KHz? Yes DFX-ish, but based on the CZ platform, and yes with Nickels(Gold Rings) as a mid-tone How many times and for how many years has that been requested?