Find's Treasure Forums
Welcome to Find's Treasure Forums, Guests!
You are viewing this forums as a guest which limits you to read only status.
Only registered members may post stories, questions, classifieds, reply to other posts, contact other members using built in messaging and use many other features found on these forums.
Why not register and join us today? It's free! (We don't share your email addresses with anyone.) We keep email addresses of our users to protect them and others from bad people posting things they shouldn't.
Click here to register!
Need Support Help?
Cannot log in?, click here to have new password emailed to you
Changed email? Forgot to update your account with new email address? Need assistance with something else?, click here to go to Find's Support Form and fill out the form.
High Frequency # 7 Best ?
- Thread starter reconj
- Start date
Someone correct me if I am wrong but I think this is a pretty accurate explanation.
The F75 operates at a nominal frequency of 13kHz. Using the frequency shift feature bumps this frequency up or down a fraction of a kHz.
I do not think that you will see a difference in response to any item due to frequency shift. Its purpose is to separate the operating frequencies of two detectors working in close proximity or eliminate external electronic interference.
Depending on how old you are you may remember television sets that had rotary tuning knobs that were dual controls. You would turn the main (center) part of the knob to choose a channel and then turn the outer part of the knob to fine tune the set. This was in the days before satellite or cable TV. Man am I getting old or what?
The frequency shift function on the F75 works like this outer knob, fine tuning the detector for optimum performance.
Hope this helps and again, if I am wrong please correct me so that I can understand this better as well.
HH
The F75 operates at a nominal frequency of 13kHz. Using the frequency shift feature bumps this frequency up or down a fraction of a kHz.
I do not think that you will see a difference in response to any item due to frequency shift. Its purpose is to separate the operating frequencies of two detectors working in close proximity or eliminate external electronic interference.
Depending on how old you are you may remember television sets that had rotary tuning knobs that were dual controls. You would turn the main (center) part of the knob to choose a channel and then turn the outer part of the knob to fine tune the set. This was in the days before satellite or cable TV. Man am I getting old or what?
The frequency shift function on the F75 works like this outer knob, fine tuning the detector for optimum performance.
Hope this helps and again, if I am wrong please correct me so that I can understand this better as well.
HH
Mike Hillis
Well-known member
http://www.findmall.com/read.php?58,296225,296225#msg-296225
Pineapple was a firm believer in that every little bit helps, so when he was using the T2 for ring hunting, he had it on F7.
HH
Pineapple was a firm believer in that every little bit helps, so when he was using the T2 for ring hunting, he had it on F7.
HH
Charlie P. (NY)
New member
I flip through the frequencies if I am getting a lot of chatter that prevents me from getting the sensitivity up very high. It has helped a couple times. Signals, being sine waves, have "nodes" where multiple signals interact. So, it doesn't take a signal on 13KHz to disturb your unit. A 50 KHz signal with a 1/2 wavelength of 25HHz and a 48KHz signal with a 1/8 wavelength of 6KHZ could be jumping on you. Stepping to a different channel could help. When you consider all of the thousands of small to large transmitters in any area it is no wonder we pick up EMI noise at times.
As noted on the link, seven steps between 12.821KHz and 13.158KHz isn't going to swing it much in favor of small targets. But, every little bit helps.
As noted on the link, seven steps between 12.821KHz and 13.158KHz isn't going to swing it much in favor of small targets. But, every little bit helps.
Mark in NC
Member
All this frequency shifting talk piqued my interest as to what was going on when we shift the F-75. I sent an email to Fisher asking about it and here's the word from the Engineers.
"Frequency shift shifts the transmitter slightly, but by such a small amount that ordinarily the receiver will still be in ground balance. If you're working in highly mineralized soil you might want to re-balance. Also note that if you shift frequencies while in static (non-motion) all metals mode, you'll probably have to retune to restore audio threshold."
My hats off to the fine folks at FT and Fisher for supporting users with a willingness to answer our questions like this.
"Frequency shift shifts the transmitter slightly, but by such a small amount that ordinarily the receiver will still be in ground balance. If you're working in highly mineralized soil you might want to re-balance. Also note that if you shift frequencies while in static (non-motion) all metals mode, you'll probably have to retune to restore audio threshold."
My hats off to the fine folks at FT and Fisher for supporting users with a willingness to answer our questions like this.