1266x Chatterboxing on Disc 1.

[M]

OK, here's the deal.
Picked up a second hand 1266x to replace the one I had years ago.
I'm one of those guys who buys stuff when the fancy strikes me, but it might be a while before I get a chance to put it through its paces, so this one has sat in the closet for a couple months now.

Came with two aftermarket spider coils (11.25" and a 5.5"). Just recently picked up two Fisher stock coils on ebay, the big 11.25" and the tiny 3.75". HUUUUGE luckout on these. The guy on ebay only listed them as 1265 coils in the auction title (meaning nobody searching for 1266 or 1266x were going to see it), and spelled it "Model Detector" (meaning that damn near NO ONE was going to see it) so the competition on them was next to nothing... Got them both for a song

In testing the new coils, I realized that the machine is chatterboxing pretty strong in default Disc 1. When I trigger over to Disc 2, the chatterboxing stops. I don't think it's a sens issue since the problem only exists in one disc setting and not the other, and even when I toggle down the sens and crank the knob to 1, it's still doing it. It's also doing it across all four coils, so it's not isolated to a coil issue.

Any ideas on this one?

 

[NEBeachcomber]

Is it possible that Discriminator #1 is not set high enough to completely tune out the iron and Discriminator #2 is -or- is the iron just factory set to just break through discrimination setting #1 ?

 

[MarkCZ]

OK, here's the deal.
Picked up a second hand 1266x to replace the one I had years ago.
I'm one of those guys who buys stuff when the fancy strikes me, but it might be a while before I get a chance to put it through its paces, so this one has sat in the closet for a couple months now.

Came with two aftermarket spider coils (11.25" and a 5.5"). Just recently picked up two Fisher stock coils on ebay, the big 11.25" and the tiny 3.75". HUUUUGE luckout on these. The guy on ebay only listed them as 1265 coils in the auction title (meaning nobody searching for 1266 or 1266x were going to see it), and spelled it "Model Detector" (meaning that damn near NO ONE was going to see it) so the competition on them was next to nothing... Got them both for a song

In testing the new coils, I realized that the machine is chatterboxing pretty strong in default Disc 1. When I trigger over to Disc 2, the chatterboxing stops. I don't think it's a sens issue since the problem only exists in one disc setting and not the other, and even when I toggle down the sens and crank the knob to 1, it's still doing it. It's also doing it across all four coils, so it's not isolated to a coil issue.

Any ideas on this one?

Your the one that out bid me on those coils
I for some reason felt like the person that got them would show up here!

Oh well, you win some you lose some! LOL!

Now back to your problem.
My 1266 is kind of chattery while I hold the coil in the air, but once I start sweeping it over the ground it quites down some and the noise seems to be more in line with ground effects rather than just holding it in the air, it does have automatic ground balancing.

Mark

 

[M]

Your the one that out bid me on those coils
I for some reason felt like the person that got them would show up here!

Oh well, you win some you lose some! LOL!

Ahahahahahaha
I too had a feeling that when I mentioned it, someone was going to 'know what auction I was talking about. LOL!
Don't worry- there are remaining opportunities out there since people still occasionally list 1265 coils without knowing that they fit the 1266. Since most of the come-lately interest is in the 1266x, they're cutting out a lot of their audience, which means low sale prices. That one was just such a freak of nature, since he misspelled it "Model Detector", meaning that nooooooooooooo one saw it. If he had spelled it right, it would've gone for 3X what it did.

Also, I see you bid 30 seconds before auction close.
Mine was entered 2 seconds before auction close, which means that you never really stood a chance to rebid.

Use Bidnip.
https://www.bidnip.com/

I think you get 5 free snipes, then they're like a .25 cents (or something like that) for each one thereafter, but believe me... If you aren't using an auction sniper, it's like taking a sharp stick to a machinegun fight. Those snipes will save you much more than they cost, and you'll win a lot more items.

Now back to your problem.
My 1266 is kind of chattery while I hold the coil in the air, but once I start sweeping it over the ground it quites down some and the noise seems to be more in line with ground effects rather than just holding it in the air, it does have automatic ground balancing.

Mark

I'm going to find a decent patch of low-mineral soil to run it over and see if it isn't just an "air" issue, and if it balances out once in the dirt. I'll try to post video of what I'm getting.

 

[M]

Is it possible that Discriminator #1 is not set high enough to completely tune out the iron and Discriminator #2 is -or- is the iron just factory set to just break through discrimination setting #1 ?

NE: It's chattering in the air so I'm thinking its not a ground sensitivity issue, but I'll know more for sure here in a bit.

 

[MarkCZ]

Also, I see you bid 30 seconds before auction close.
Mine was entered 2 seconds before auction close, which means that you never really stood a chance to rebid.

Well with broad band and an egg timer I can cut it pretty close, but it wasn't the timing that you won the auction by, it was the amount! I only bid a small amout just to keep it from going for nothing, If I had bid like $300.00 I figure I would have out bid about everybody interested. I never put in a serious bid with enough time to re-bid, I get it or its gone! You had a higher dollar value on it than I did.

Anway, I think what some of the noise might be is the ground balance circuit is working but, there isn't anything to ground balance, once you give the circuit something to do it settles down a bit and you start getting what is called "Ground Chatter"

Mark

 

[WV62]

For testing all things need to be the same, so I would pick a disc number and set both the same. Then do your test both the same, if there is a difference it is in the detector. You may use some contact cleaner around the control knob.

Good luck,

Ron in WV

 

[pan4au]

it sounds like you have a bad component in the disc 1 circuit. It might be a good idea and call Fisher and talk to someone in service

 

[TheOtherLeggoHead]

Your in an area with alot of rf. Move, then try it.

 

[M]

Your in an area with alot of rf. Move, then try it.

I definitely am in an 'interference prone' area (within eyesight of the huge 6 story powerline right of ways that feed the city of Chicago)- and I considered that- but wouldn't it do the same thing on Disc 2 if 'interference' were the case?

 

[pan4au]

Your in an area with alot of rf. Move, then try it.

I definitely am in an 'interference prone' area (within eyesight of the huge 6 story powerline right of ways that feed the city of Chicago)- and I considered that- but wouldn't it do the same thing on Disc 2 if 'interference' were the case?

most likely it would..that's why I was thinking it was a bad component in Disc 1... circuits disc 1 & 2 should be the same configuration.. you just select between the two circuits with the mode switch...

 

[shooter]

Pan's right , you have a bad component On the DISC1 side, call Felix your going to hear a million ideas on the subject and a lot of them might be right, but it comes down to the repairing it if you can get the parts and repair it plug away, but if you can't you'll have to send it in anyway. my 1265X was billed at $95.00, they replaced 2 pots, speaker jack, whole outside Control case (I supplied that Part) Battery cover and did all Adjustments , thing looks and acts brand new, for 95 buck, its a know brainer. This 1265X is going up on auction.