gambol1,
One last suggestion for you. And I would say that this is the best bench mark to start from.
Remember you had already started with a 150 and went up to a 250, and now... You always want to expand your hunting and the 75 is not expandable beyond dry land, the beach. You will want to go out into the water and get the good stuff.
It really looks like you are a dedicated hunter. If you have used detectors and are willing to expand your tool box, you must understand them and know how to use them. You are off to a good start. So I don't think you will make a mistake.
Looking around iron might seem to be a neat trick, but it is just advertising hype. It might seem as if you are, but not.
Metal detectors are really pretty simple. Your transmitting coil puts out a magnetic field or pulse with a receiver coil receiving what comes back. The electronics on-board dissects the receiving coils info into a few basic measurements, amount of received signal as compaired to transmitted signal and the phase shift. The reflectivity of the target is what generates these changes. Different transmitting frequencies can give better reflectivity values under certain conditions. The more frequencies, transmitting power, input sensitivity, automatic adjustments/settings and the amount of user adjustments sets the use and price of the machine, not to mention how the info is presented to you.
When you get a machine that is designed for beaches and underwater use, it has been optimised for those conditions. If you find that a feature you have on a land machine is not on a beach comber, that means that feature or adjustment is useless in the beach environment.
So if you are looking to do beaches and enhance you dry land searches you are looking at the right equipment. But if you are looking to do beaches and beyond look into deicated detectors.
These guys have been around for a long time and they have pretty much got it all together. Some of the companies use the same electronics inside. Just the programming is different and the box it comes in is a different color.
The best situation is to have a local store that knows the detectors and the game itself. It is worth spending a few extra dollars for the one on one. Besides, if the guy has been around for a while he has some loaners for you to try before you buy. The on-line dealers cannot compete with that.
Good luck with the search and please let us know what you decided and how it's working out for you.
-Roy-
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