Magnetic Field Sensor FGM-3 For Sale: $30

[Charles]

Hi,


I have a JWFisher Pulse 12 boat towable metal detector. The fish is the same dimensions as the one used for their SSS. The pulse 12 is made of PVC. The data sheet for the SSS says PVC, epoxy, and stainless. I'm not sure where the stainless is since I haven't seen but only pictures. If anyone would think that it would be helpful, I would be happy to take many detailed pics of the fish and provide dimensions. The endcaps are removeable and one has lead weight in it. I bought it used in non-working condition and I haven't restored it yet. But I'm happy with the purchase if for no other reason than to see how they made the towfish. As I have ordered towtec boards, I may wish to duplicate it for that alone. If you are interested let me know. It would be a few days before I could help as I just had gall bladder surgery and I'm not moving around too good yet and next week I'm scheduled to go to NY on business.


Thanks,


Charles


JWFishers homepage (http://www.jwfishers.com)

[Patrick]

Charles,


I would be interested in seeing the photos. Maybe some shots on how they connected the pieces together, how they mounted the "insides", etc.


Thanks,


Patrick

[Jan]

Sture,


Thanks, so it does not matter where we buy.


Regards,Jan

[Sam Scafferi]

>>Is there any possibility to replace the antenna Rods (in MFD theory)by other sensors ?


>Dell Winders has built such a device. It electronically detects the signal line produced by his MFD units. He told me the solar magnetic activity has been so high lately that the unit does not work well and he is not going to put it out on the market. He says L-rods work the best until the solar magnetic activity subsides. I don't have his site address but if you check at www.treasureamerica.com and click on Links then click on Omnitron.


Yes... probably L-rods will need to be employed for some time to come.

[Sam Scafferi]

>>Is there any possibility to replace the antenna Rods (in MFD theory)by other sensors ?


>Dell Winders has built such a device. It electronically detects the signal line produced by his MFD units. He told me the solar magnetic activity has been so high lately that the unit does not work well and he is not going to put it out on the market. He says L-rods work the best until the solar magnetic activity subsides. I don't have his site address but if you check at www.treasureamerica.com and click on Links then click on Omnitron.


Yes... probably L-rods will need to be employed for some time to come.

[Sam Scafferi]

>>Is there any possibility to replace the antenna Rods (in MFD theory)by other sensors ?


>Dell Winders has built such a device. It electronically detects the signal line produced by his MFD units. He told me the solar magnetic activity has been so high lately that the unit does not work well and he is not going to put it out on the market. He says L-rods work the best until the solar magnetic activity subsides. I don't have his site address but if you check at www.treasureamerica.com and click on Links then click on Omnitron.


Yes... probably L-rods will need to be employed for some time to come.

[Paul]

Hi Carl,


Would your 7" coil decal happen to be in PadsPCB


format?? I am working on a 14" spiral. Maybe we


could exchange Pads lib files??


paul

[Paul]

Hi Carl,


Would your 7" coil decal happen to be in PadsPCB


format?? I am working on a 14" spiral. Maybe we


could exchange Pads lib files??


paul

[Paul]

Hi Carl,


Would your 7" coil decal happen to be in PadsPCB


format?? I am working on a 14" spiral. Maybe we


could exchange Pads lib files??


paul

[Carl]

>Hi !


>Carl I've replaced zener diode and te voltage is acceptable so I didn't wached tech forum I've completed Magnum constuction and it was working !!! (for a whie :-( so I've connected everything again (I've add faraday shield)and it wasn't working :-( IC9 or IC 10 was damaged then I saw your reply for my message "magnum transistor voltage" whwre you said that zener diode is connected inccorrectly in magnum plans, anyway could it be reason for burning these IC's or maybe this is tr3 fault ?


No, the zener hookup should only affect the startup of the voltage reference - at worst, the reference won't start up and the 11.2v stays low. I don't see a way that TR3 could damage the ICs either; in fact, I don't see how IC9 & 10 could burn up unless there is a serious hookup problem.


>btw. did you hear about modified magnum called "tesla"


No, I have not. How is it modified?


- Carl

[Carl]

>Hi !


>Carl I've replaced zener diode and te voltage is acceptable so I didn't wached tech forum I've completed Magnum constuction and it was working !!! (for a whie :-( so I've connected everything again (I've add faraday shield)and it wasn't working :-( IC9 or IC 10 was damaged then I saw your reply for my message "magnum transistor voltage" whwre you said that zener diode is connected inccorrectly in magnum plans, anyway could it be reason for burning these IC's or maybe this is tr3 fault ?


No, the zener hookup should only affect the startup of the voltage reference - at worst, the reference won't start up and the 11.2v stays low. I don't see a way that TR3 could damage the ICs either; in fact, I don't see how IC9 & 10 could burn up unless there is a serious hookup problem.


>btw. did you hear about modified magnum called "tesla"


No, I have not. How is it modified?


- Carl

[Carl]

>Hi !


>Carl I've replaced zener diode and te voltage is acceptable so I didn't wached tech forum I've completed Magnum constuction and it was working !!! (for a whie :-( so I've connected everything again (I've add faraday shield)and it wasn't working :-( IC9 or IC 10 was damaged then I saw your reply for my message "magnum transistor voltage" whwre you said that zener diode is connected inccorrectly in magnum plans, anyway could it be reason for burning these IC's or maybe this is tr3 fault ?


No, the zener hookup should only affect the startup of the voltage reference - at worst, the reference won't start up and the 11.2v stays low. I don't see a way that TR3 could damage the ICs either; in fact, I don't see how IC9 & 10 could burn up unless there is a serious hookup problem.


>btw. did you hear about modified magnum called "tesla"


No, I have not. How is it modified?


- Carl

[zedlav dyolf]

[zedlav dyolf]

[zedlav dyolf]

[Jim Kennard]

This high sensitivity Magnetic Field Sensor is utilized in the construction of fluxgate magnetometer and gradiometer systems for detecting the earth’s magnetic field. The specifications and applications for the FGM-3 can be found at: www.fatquarterssoftware.com This single unit is still in the original factory packaging.

The Gradiometer kit previously offered for sale, to those on this forum, has been sold. Thank you for your inquiries.

[Ralph Saliba]

I am interested in the purchase of this Magnetometer. I live in Malta, ie in the Meditterenean Area.

My Address is ;
24 Maria De Dominici Street
St. Lucia PLA10
MALTA

How do you like payment?

Regards
Ralph

[Jim Kennard]

The FGM-3 sensor has been sold.
You can obtain this sensor from http://www.fatquarterssoftware.com/
There are also interesting magnetometer application notes on this site. The owner, Erich Kern, has always been very helpful in answering technical questions on the use of these sensors.