Interesting read. We sometimes get so wrapped up in finding coins, gold or relics that we forget the other applications for detectors. These units are an integral part of daily "life and death" applications.
The variances in the ground mineralization at this test lab were dramatic. It was interesting to note the consistency of both Minelab units across all levels of mineralization, in comparison to the other makes and models. Most of the models lost sensitivity as they encountered more mineralization, with the exception of the two Minelab models. They both actually gained sensitivity in the most highly mineralized conditions. It was also apparent that Minelab engineered these units to provide maximum sensitivity over the entire spectrum of mineralization as opposed to some models that obviously concentrated on individual conditions.
The F1A4 is described as a pulse, dynamic mode detector, using a unipolar waveform. It offers multiple pulse-width technology for improved soil compensation. It also provides different audible signals for the detector status as well as for target classification. Reading this makes me wonder where the Hobby Division of Minelab will evolve? Having a PI detector with GB and TID would be HUGE!!!
One other statement that caught my attention was the lack of settling (or compaction) of the soil used at each test target. At first I wondered if soil compaction would have an effect on the depth of detection. But then I thought...... in the real world, who is going to volunteer to tamp down a land mine???
Thanks again Bill. With your permission, I would like to link this up to the FAQFAQ section. Let me know.
HH Randy
(attn: Jackpine Savage you are being baited). 