australian electronic gold prospecting forum.com

Common interest forum. => General chat and discussion forum => Topic started by: Doug on Thursday March 7 2019 12:23:45 AEDT PM



Title: The QED can still use more coils than the 2300!
Post by: Doug on Thursday March 7 2019 12:23:45 AEDT PM
 CT apparently have announced a new range of coils for the SDC.
http://www.finders.com.au/finders-forum-info/finders-forum-index/
The QED can use coils from 6"-36" something the SDC can't and taller folk will not get lower back problems like they will using the SDC! As well you can buy a QED with a range of coil sizes for very much less than the overpriced SDC!!!! The SDC with just one of the new coils will cost close to $A4000!
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Thursday March 7 2019 17:46:48 AEDT PM
Detech, the QED distributor have a stand at this years "The Australian Gold Prospectors Expo" at Bendigo Showground 6th - 7th April.
QED's will be on display and for sale.

https://www.youtube.com/watch?v=S6gWgCvsTzM




Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Thursday March 7 2019 21:20:05 AEDT PM
  
Detech, the QED distributor have a stand at this years "The Australian Gold Prospectors Expo" at Bendigo Showground 6th - 7th April.
QED's will be on display and for sale.



You can get 2 QED's for the price of one Sdc ::62:: or 1 QED with 3 or 4 more coils for less  than the price of the SDC with ONE coil!! ::62::
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: WM6 on Thursday March 7 2019 23:59:01 AEDT PM
  

Detech, the QED distributor have a stand at this years "The Australian Gold Prospectors Expo" at Bendigo Showground 6th - 7th April.
QED's will be on display and for sale.


Hi BW,

can you say (approximately of course) what would be QED tolerances
in regard to still acceptable mono coil inductance and coil resistance:

Coil   L = (approx.)   from  ___   to ___

Coil   R = (approx.)   from  ___   to ___
 
Thanks


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Friday March 8 2019 06:19:23 AEDT AM
The tolerance hasn't been evaluated in detail but the QED is far more accepting of out of spec coils.
A 494uH, 1.36 ohm coil was tried and worked but with lower than expected performance. Changing the damping from 500 to 900 ohms bought the performance closer to standard.


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Friday March 8 2019 06:23:32 AEDT AM
I would expect that the larger SDC coils would provide a larger antenna for EMI making the incessant, mind numbing chatter even worse than heard in this recent video.

https://www.youtube.com/watch?v=GYGFZrFpiXY

The .024g nugget named is actually 0.24g.


Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Friday March 8 2019 09:11:55 AEDT AM
  
I would expect that the larger SDC coils would provide a larger antenna for EMI making the incessant, mind numbing chatter even worse than heard in this recent video.


The .024g nugget named is actually 0.24g.

 I would find that horrible chatter intolerable!
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Friday March 8 2019 12:20:55 AEDT PM
 The new SDC coils are not waterproof  so if they are used in water and they stuff the SDC then goodbye to your SDC warranty. ::02::
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Friday March 8 2019 14:59:41 AEDT PM
The depth performance of the SDC on bigger bits is woeful! Because of the methods that ML use to overcome magnetic/VRM ground and yet still have sensitivity to very small gold I doubt that the new coils will improve the depth capability on bigger bits  much at all. The QED (and for 1/2 the price of the SDC!!)  eats the SDC for breakfast  for depth on bigger,deeper bits and  will I expect maintain this advantage even more as the QED can use much  bigger coils!
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: Dontbstme on Friday March 8 2019 18:12:45 AEDT PM
  
The depth performance of the SDC on bigger bits is woeful! Because of the methods that ML use to overcome magnetic/VRM ground and yet still have sensitivity to very small gold I doubt that the new coils will improve the depth capability on bigger bits  much at all. The QED (and for 1/2 the price of the SDC!!)  eats the SDC for breakfast  for depth on bigger,deeper bits and  will I expect maintain this advantage even more as the QED can use much  bigger coils!
doug ::419::
You can always hook up my 30"CC to the QED and the SDC is history and probably everything else too since the QED seems to be chewing up on the GPX depth.
Later I will manufacture 41" CC too, but I am not going bigger as the weight will probably become intolerable.


Title: Re: The QED can still use more coils than the 2300!
Post by: GARY on Saturday March 9 2019 00:19:57 AEDT AM
  

I would expect that the larger SDC coils would provide a larger antenna for EMI making the incessant, mind numbing chatter even worse than heard in this recent video.


It would be interesting if another video was recorded with the SDC in the video then fitted with one of the new 11" round mono coils and the QED with an 11" round mono and compare them over the targets buried at this test site, even over those tiny nuggets to display the QED's versatility & stability.

Gary.


Title: Re: The QED can still use more coils than the 2300!
Post by: Reg Wilson on Saturday March 9 2019 13:53:41 AEDT PM
I like that idea Gary. My money would be on the QED.


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Saturday March 9 2019 15:59:11 AEDT PM
I look forward to somebody (pref a ML dealer or Coiltek) making some comparison videos with the "new" coils at the Coiltek test patch.


Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Saturday March 9 2019 16:16:18 AEDT PM
Wow what a detector the sdc must be.
 Quote from the village idiot! ::702::
"---The SDC picks up everything within 12' no matter what size"!!! ::620:: ::620::
doug ::419::




Title: Re: The QED can still use more coils than the 2300!
Post by: egixe4 on Saturday March 9 2019 16:55:32 AEDT PM
Well it's one thing having new coils available for the SDC
But it's another story fitting the new coils
I've tried it, and it's a right royal PIA, the coil to detector plug is inside the SDC housing.

I can only conclude that the new Coils will come with some kind of patch lead??

You can see some pic's here, (Not mine)
https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=19126







Title: Re: The QED can still use more coils than the 2300!
Post by: Doug on Saturday March 9 2019 17:04:06 AEDT PM
  
Well it's one thing having new coils available for the SDC
But it's another story fitting the new coils
I've tried it, and it's a right royal PIA, the coil to detector plug is inside the SDC housing.

I can only conclude that the new Coils will come with some kind of patch lead??

You can see some pic's here, (Not mine)
https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=19126



You have to buy the SDC accessory pack to fit the coils to the SDC.
doug ::419::


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Saturday March 9 2019 18:00:18 AEDT PM
  
Wow what a detector the sdc must be.
 Quote from the village idiot! ::702::
"---The SDC picks up everything within 12' no matter what size"!!! ::620:: ::620::
doug ::419::




Sure Damn Clever


Title: Re: The QED can still use more coils than the 2300!
Post by: egixe4 on Sunday March 10 2019 10:41:49 AEDT AM
  
  
Well it's one thing having new coils available for the SDC
But it's another story fitting the new coils
I've tried it, and it's a right royal PIA, the coil to detector plug is inside the SDC housing.

I can only conclude that the new Coils will come with some kind of patch lead??

You can see some pic's here, (Not mine)
https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=19126



You have to buy the SDC accessory pack to fit the coils to the SDC.
doug ::419::

How much is this accessory pack, and what does it include Doug?

 


Title: Re: The QED can still use more coils than the 2300!
Post by: Goldman on Sunday March 10 2019 11:01:36 AEDT AM
  
  
  
Well it's one thing having new coils available for the SDC
But it's another story fitting the new coils
I've tried it, and it's a right royal PIA, the coil to detector plug is inside the SDC housing.

I can only conclude that the new Coils will come with some kind of patch lead??

You can see some pic's here, (Not mine)
https://www.prospectingaustralia.com.au/forum/viewtopic.php?id=19126







You have to buy the SDC accessory pack to fit the coils to the SDC.
doug ::419::

How much is this accessory pack, and what does it include Doug?




 

Check out the costs and coils at lucky strike at Geelong
https://luckystrikegold.com.au/products/byhierarchy/42/43

Cheers Goldman


Title: Re: The QED can still use more coils than the 2300!
Post by: egixe4 on Sunday March 10 2019 11:38:55 AEDT AM
Thanks Goldman

 ::62::


Title: Re: The QED can still use more coils than the 2300!
Post by: GARY on Friday March 15 2019 17:42:39 AEDT PM
  

It would be interesting if another video was recorded with the SDC in the video then fitted with one of the new 11" round mono coils and the QED with an 11" round mono and compare them over the targets buried at this test site, even over those tiny nuggets to display the QED's versatility & stability.

Gary.


Having now watched a video of an SDC with the CT 11" coil attached the SDC's threshold is still unstable, and NOT to my liking compared to the QED's threshold which is super smooth.

Also from what I am reading on other forums the 14"x 9" coil may be the preferred coil due to more ground coverage.

How much extra depth from either the 11" or 14"x 9" coils is yet to be determined although in the videos the operator is praising it up.

Gary.



Title: Re: The QED can still use more coils than the 2300!
Post by: Goldman on Friday March 15 2019 21:22:36 AEDT PM
  
  

It would be interesting if another video was recorded with the SDC in the video then fitted with one of the new 11" round mono coils and the QED with an 11" round mono and compare them over the targets buried at this test site, even over those tiny nuggets to display the QED's versatility & stability.

Gary.




Having now watched a video of an SDC with the CT 11" coil attached the SDC's threshold is still unstable, and NOT to my liking compared to the QED's threshold which is super smooth.

Also from what I am reading on other forums the 14"x 9" coil may be the preferred coil due to more ground coverage.

How much extra depth from either the 11" or 14"x 9" coils is yet to be determined although in the videos the operator is praising it up.

Gary.




We could not get any of the buried targets at the test patch with the SDC with the standard coil, so you are quite correct in wanting a comparison at the test patch.
Would then be good to compare against the small pieces placed on the ground. Maybe this can happen soon.

Cheers Goldman


Title: Re: The QED can still use more coils than the 2300!
Post by: bugwhiskers on Saturday March 16 2019 07:21:30 AEDT AM
I am looking forward to seeing videos of Coiltek testing the new SDC coils at their test patch north of Maryborough.