SOMEONE EXPLAIN FREQUENCIES TO ME READ THIS

[mrislandguy]

I have a gtp 1350 and a gti 2500,, i have been detecting for a couple years but i am kinda confused when it comes to certain frequencies,, what frequency should i set my detectors on,,, why should i set it that frequency,, does the frequency change the performance of the machines,,
please explain the frequencies to me,,,
thanks and any other tips for the gti 2500

 

[cwilk]

The frequency adjust on the 2500 minimally adjusts the operating frequency allowing you to compensate for electrical interference. This interference might come from another detector, power lines, or some other source. There was a user about 6-8 months ago who used his oscilloscope to determine how much it actually changed the frequency. I printed it but it is in a big pile of papers right now. You might be able to search for the post. Oddly the lower the setting the higher the frequency is what his test found. I asked Garrett for the information and they said it was somewhat of a trade secret but they did say that adjusting the frequency will not significantly change the operation of the detector.

Here is that link. I found it by searching. Tons of old posts with good info. Try searching various combinations of subject you are interested in:

http://www.findmall.com/read.php?32,702255,702255#msg-702255

Chris

 

[Uncle Willy]

The frequency has nothing to do with the performance. It is used to eliminate crosstalk between two or more detectors operating close to each other and also interference from power lines.

Bill

 

[rglyons]

Let me try to explain. Each metal detector has an output frequency, usually from 5kHz to maybe 20 kHz. The coil is optomized to the metal detector's frequency. With the Ace 250, that's 6.5kHz. Most of you that fooled with CB's in the past remember a thing called "Tuning the antenna to the lowest Standing Wave" This means that the freq. the antenna is "optomized" to is the freq that the most radiated power is effected. The more radiated power the further the radio signal goes both in a CB or Metal detector. Detectors that have a freq shift switch are in very small increments. This will usually get the detector away far enough from other detectors freq. to stop interference.. The difference, if an Ace 250 would have it, would probably be from maybe 6.4kHz to 6.6kHz which would still be in the max radiated power range. Also this is why you generally cannot switch coils back and forth from different detectors.

I hope I can upload the following sketch ok and it's understandable.