As for the operating frequency, I recall the early MXT literature and write-up by Dave Johnson, design engineer, stated the MXT operated at 13.889 kHz. I know that with some models it was all a matter of rounding of numbers. The 6.592 kHz White's models were later shown as workign at 6.59 kHz, and then near the end of production of those models they were rounded again to show just 6.6 kHz.
Below is a cut-and-paste of the MXT Engineering report written by the design engineer, Dave Johnson. I think it answers your question, but I have made bold and colored the part that apply to the operating frequency.
While the MXT was still under development, the DFX was introduced. The MXT design was then revised to run at about 14 kHz in order to take advantage of the DFX loops. When it was finally time to call it "good" in June 2002, the MXT went into production quickly and smoothly.
CIRCUlT DESIGN
For the MXT, we chose an operating frequency of 13.889 kHz. This is high enough to give good sensitivity to gold, low enough to give good target ID on typical coin, trash, and relic targets, electrically compatible with search coils derived from the DFX and halfway in between power line harmonics to minimize electrical interference.
There you go. It's about 14 kHz. The main this is that the MXT, MXT 300 and MXT Pro work great! If they have revised them to work at a different frequency, they would have to have to match up with the earlier models as well as the M6.
Monte
IS IT 13 0R 14 KHZ FREQUENCY?THANK YOU FOR YOUR HELP.---------------------------------------------------------
BILL
. real cool dogs.