GLEN. H. Posted July 18, 2012 Report Share Posted July 18, 2012 I live in the Sierra Nevada near Forest hill, for the last couple of weeks I have Ben experiencing a lot of EMI. I was wondering if anyone in the general area is experiencing the same thing. Im using a gpx 4500 with a 14x9 blitz coil. Thanks... Link to comment Share on other sites More sharing options...
wes Posted July 19, 2012 Report Share Posted July 19, 2012 I thought I was too, but it turned out my coil had water in it and was giving me the instability.I switched coils and life was good again with about the same emi as usual. Link to comment Share on other sites More sharing options...
Nuggetslayer Posted July 19, 2012 Report Share Posted July 19, 2012 It might be from all the activity due to the fires up there. I know they had a lot of aircraft in the air, plus all the radio equipment from the ground crews. Link to comment Share on other sites More sharing options...
GLEN. H. Posted July 19, 2012 Author Report Share Posted July 19, 2012 Wes I hope it's not my coil. Nuggetslayer I think u might be right. Thanks guys. Link to comment Share on other sites More sharing options...
SoCalJohn Posted July 19, 2012 Report Share Posted July 19, 2012 There was a huge CME from the Sun last week. Could barely keep the detector stable in So. Cal. Link to comment Share on other sites More sharing options...
DesertNuggets Posted July 19, 2012 Report Share Posted July 19, 2012 Not using a minelab but my detector was acting up and it was a bad coil. Replaced and perfect again. Link to comment Share on other sites More sharing options...
AZNuggetBob Posted July 19, 2012 Report Share Posted July 19, 2012 EMI gets into your detector a lot of different ways,and can be caused by several different types of transmissions. what you may be hearing is the radar the aircraft are using to keep from slamming into each other. your coil wire has an outer braid. this braided copper also has a coating on the wire (usually red) its also is a form of shielding. the best shielded wire I ever found was old military surplus silver plated coax wire salvaged from Los Alamos NM labs. They had little margin for error there. BOOM! This wire made a killer quiet extention wire for my hip mounting rig. but even with this plating the wire coating will break down over time with normal movement from internal chaffing and it's expensive. Minelab not only uses the metal box just for strength, its also a form of shielding. on the their machines with plastic end caps they have a thin piece of aluminum foil liner to help keep the EMI out. there are other things their using too. I dont think this is your problem, probably just radar overload. AzNuggetBob Link to comment Share on other sites More sharing options...
LuckyLundy Posted July 20, 2012 Report Share Posted July 20, 2012 Might be them big afternoon thunderstorms. They don't have to be close, to give you a noisy hunt! Turn your gain down some and try Extra Smooth.LuckyLundy Link to comment Share on other sites More sharing options...
AZNuggetBob Posted July 20, 2012 Report Share Posted July 20, 2012 RickEvery once in awhile we get the military fighter jets coming through where were hunting and they just blow the detectors away. I know its them because when I point my coil at them it gets worse. Its real bad you can take a break until they leave. I'm just not sure what it is? I've heard its caused by their radar jamming? have you heard anything about this? AzNuggetBob Link to comment Share on other sites More sharing options...
LuckyLundy Posted July 20, 2012 Report Share Posted July 20, 2012 Bob,Your correct, combat aircraft have a ton of survive to fight systems. Depends on the training mission to which tactical warfare switches to engage to over come the aggressor. You know it will be a bad day detecting when your hunting a high bench and a F-16 zips by eye level in the wash below. Just like a distant thunderstorm, it's a tough day swinging a Minelab!Rick Link to comment Share on other sites More sharing options...
AZNuggetBob Posted July 22, 2012 Report Share Posted July 22, 2012 Hey RickHere is a post I found on the forum with a video showing the F-16's. Its a blast watching these guys go by. I've had them come by at eye level too. but if they have that jamming on you may as well sit back and watch the show. this vid shows what they do best, protecting us. Thanks for the video Terry.AzNuggetBobhttp://www.nuggethun...?showtopic=7346 Link to comment Share on other sites More sharing options...
GLEN. H. Posted July 22, 2012 Author Report Share Posted July 22, 2012 I went out sat up around foresthill. My detector ran quieter than it has but still a lot of emi. A couple of the guys I was with had same problem, they were using the gpx 5000. Radar, sun spots,thunderstorms who knows. Sweet video!! Link to comment Share on other sites More sharing options...
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