The "Hz" Button

[limegoldconvertible68]

The "Hz" Button

How often do the rest of you use this button. My last three hunts I have used it so I was wondering if anyone has found anything interesting about it. All I have ever done is push it once. Then ground balance again. That one push so far has settled the machine down to the point that its usable. I know the manual mentions that "each frequency change requires a push of the menu button" but I forgot to do that. I was wondering if I even changed the frequency. If I didn't why did the machine quiet down? The placebo effect

 

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[Charlie P. (NY)]

Re: The "Hz" Button

The F-75 has seven frequency pre-sets and I have changed it only a few times (this will be my third season). The step increment change isn't much - like 13.010 Hz to 13.020 Hz, etc. - but it can help to eliminate EMI in certain areas.

I couldn't tell you what I am currently on but as I remember it is "7" - so maybe 13.070 Hz.

 

[rjw4law]

Re: The "Hz" Button

usefull advise, thank you.

 

[Sky Pilot]

Re: The "Hz" Button

Lime, Skypilot here! That frequency button will help when in certain areas your unit is not operating at peak efficiency. Also, if EMI, or "noise" from other detectors are a problem, you can get around that by changing the frequency. A good example would be noise from power lines or electric fences. It doesn't always eliminate the problem, but it helps. Also, in certain minerals swapping to a different frequency will allow for deeper ground penetration. If you are hunting with someone with a similar detector, stay at least 10 yards away, to avoid interference. I will add this for what it is worth: My hunting buddy and I once had a pair of CZ-7's and wondered why we had performance issues when we searched together, even maintaining an appropriate distance apart. We placed targets on the ground and found that if we were not at least 30 yards from one another, and on another frequency, the detectors would "cross talk" silently with one another, thus hindering our performance! It is a case of hit and miss to find the frequency that works best in your area, although generally the preset is best. If you must change frequencies to avoid another detector, it is my advise to talk the other guy into switching his! Great hunting and good luck!! Hope this helped! Regards, Richard

 

[Streak!]

Re: The "Hz" Button

the reason it settled down was likely because you Re-groundbalanced, because it doesnt sound like you changed the freq.
Being a bit too positive will cause chatter, and the simple task of rebalancing may have made enough of a change to settle it down.
Changing the freq will not improve preformance UNLESS your experiencing interference.
The increments are just too small to make meaningful differences in performance on targets or ground types. Typically..... for those kinds of changes to occur, the changes in frequencys have to be a lot bigger. (Like the difference between 3 Khz for coins....and 50 Khz for gold). higher freqs tend to favor smaller low conductors (but dont penetrate the ground as well), and lower freqs tend to favor bigger higher conductive targets (Read deep silver), and penetrate the matrix better. Tiny changes like the ones on machines to help out with interference typically have no effect of performance, UNLESS they help remove unwanted interference, and then they can make a measurable difference............. Streak!

 

[Sky Pilot]

Re: The "Hz" Button

the reason it settled down was likely because you Re-groundbalanced, because it doesnt sound like you changed the freq.
Being a bit too positive will cause chatter, and the simple task of rebalancing may have made enough of a change to settle it down.
Changing the freq will not improve preformance UNLESS your experiencing interference.
The increments are just too small to make meaningful differences in performance on targets or ground types. Typically..... for those kinds of changes to occur, the changes in frequencys have to be a lot bigger. (Like the difference between 3 Khz for coins....and 50 Khz for gold). higher freqs tend to favor smaller low conductors (but dont penetrate the ground as well), and lower freqs tend to favor bigger higher conductive targets (Read deep silver), and penetrate the matrix better. Tiny changes like the ones on machines to help out with interference typically have no effect of performance, UNLESS they help remove unwanted interference, and then they can make a measurable difference............. Streak!
Streak! Skypilot here! Welcome to T-Net!! What you said is basically correct, however I've found a few places where the little difference that the frequency shift made was the difference between success and failure. Sweetwater TN. is a good example! There is a farm there where Confederates camped in '63, and the '70-'75 model will not operate correctly on the preset frequency! Now, this is definitely an anomaly, yet it is that way. This farm is several hundred acres, and the area we search most is a long way from any source of EMI! Just thought I'd pass that along! Great hunting and good luck!! Regards, Richard

 

[Streak!]

Re: The "Hz" Button

the reason it settled down was likely because you Re-groundbalanced, because it doesnt sound like you changed the freq.
Being a bit too positive will cause chatter, and the simple task of rebalancing may have made enough of a change to settle it down.
Changing the freq will not improve preformance UNLESS your experiencing interference.
The increments are just too small to make meaningful differences in performance on targets or ground types. Typically..... for those kinds of changes to occur, the changes in frequencys have to be a lot bigger. (Like the difference between 3 Khz for coins....and 50 Khz for gold). higher freqs tend to favor smaller low conductors (but dont penetrate the ground as well), and lower freqs tend to favor bigger higher conductive targets (Read deep silver), and penetrate the matrix better. Tiny changes like the ones on machines to help out with interference typically have no effect of performance, UNLESS they help remove unwanted interference, and then they can make a measurable difference............. Streak!
Streak! Skypilot here! Welcome to T-Net!! What you said is basically correct, however I've found a few places where the little difference that the frequency shift made was the difference between success and failure. Sweetwater TN. is a good example! There is a farm there where Confederates camped in '63, and the '70-'75 model will not operate correctly on the preset frequency! Now, this is definitely an anomaly, yet it is that way. This farm is several hundred acres, and the area we search most is a long way from any source of EMI! Just thought I'd pass that along! Great hunting and good luck!! Regards, Richard

Just out of curiosity Richard, what are your GB settings and Fe304 meter reading at the site you mention??
(For instance...if you change the freq, and dont re-GB, then your Gb may be a bit negative, and this alone can sometimes improve target responses in funky soils.
There also "may' be a "hidden" source of Rf interference you cant hear, and changing the Freq is helping combat it, resulting in better performance. (this is probably the most likely secenario)
Both Tom Dankowski and Dave Johnson both have said that the small changes in Freq wont have any real impact on depth and performance, everything else equal, and after a lot of tests in different spots I tend to agree with them.
I'd be real curious to know what the actual mechansim is that improves perfromance in YOUR area. I'm sure your correct and that it is a verifiable improvement in performance. (heck...YOUR the one that detects there!) I'd just be curious to know exactly WHY it improves things. thanks for the reply. Always good to hear how the 75 works in other parts of the country. Streak!

 

[Sky Pilot]

Re: The "Hz" Button

Streak! Richard here! I presently am in the middle of modifying my '75, and to be honest with you, (the only way to be), I haven't been using it for quite sometime and do not remember the settings. That is the pure truth. I will, however, try the modded version and let you know the results. It is great to know that you want to see proof, rather than just rhetoric, and thank you for the kind words that allow me to present my notion without doubt on your part! THAT is how we learn from one another, and I will definitely post the results once my detector is back in operation. Once again, welcome to TNet! Great to have you here! Regards, Richard

 

[Sky Pilot]

Re: The "Hz" Button

Streak! One more thing: Those are all valid points you mentioned, and will definitely be considered when performing my next analysis! Regards, Richard

 

[Streak!]

Actually richard, I screwed up a bit in the post..

I wrote "haing the Gb a bit too positive will cayse chatter:. What I meant to say is that habing the Gb a bit too NEGATIVE will cause chatter. Didnt realize my mistake till I re-read it. Thanks for the kind words.
Setting the Gb a bit positive will actually make the machine run a tad quieter, (but a bit less sensitive) and most machines with "preset" groundbalances have the Gb set positive just for that reason. Streak!