I picked up a GMH (the first model) for my buddy Cliff (if he's still alive) and was doing some air testing with it. A bit of a hassle because it didn't have a battery holder so I used a low voltage regulated 9v camera power supply to power it up. Anyway, air testing, I took my 1 grain test 'nugget' and decided to see if it could see it. Now, this little piece is difficult for ANY detector to find..next to unheard of for a low KHz machine to see it. I switched to AM mode, with the 8" concentric coil and whadya know, there was a response! Well, not an ear bangin' one, but sure 'nuff. Well, the AM mode with it's slow autotune is next to useless here, but the disc. mode will work fine. Switched it over to disc. and.. an ever so slightly more distinct response was heard. Huh! Well, I'll be getting a GMHIII in a couple of weeks and will be taking the whole works up to one of my favorite testing spots, the Coquihalla river. They'll quite possibly tank there, and so far only air tests have been done, but that old GMH has already outdone a Vaquero (had one, tested it, ditched it) in small gold sensitivity in disc. I'll also try out an F70 that's on the way. Personally, I don't really thing that either the Fisher or Garrett can hold a candle to my MXT when it comes to nugget hunting (also had a GTI 2500 and it couldn't either) but for coin/jewelry/relic hunting they'd probably prove to be the better units.
Well, if the weather holds I'll rig up an extension and see how the GMH does on in-ground low conductors. Have another 4-5 grain test nugget (which I'll have to root around for) and I'll see how it does with that one. ..Willy.
Well, if the weather holds I'll rig up an extension and see how the GMH does on in-ground low conductors. Have another 4-5 grain test nugget (which I'll have to root around for) and I'll see how it does with that one. ..Willy.