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#1

StayyerAU
Member
Joined: 30 March 2019
Posts: 325
Member
27 February 2021 07:53 am

G'day

I have an Sd2000 that has had a mono and dd switch mod done to it, but the switch has been removed from it, there are stickers each side of the plugged switch hole with one saying DD low and the other saying MONO high, on opening up the box I can see that there are several components on the circuit boards that are new as they are unpainted, and several pins where I assume that the wires from the switch would have been attached, the detector is working and on testing it will run both dd and mono coils which seem to operate as normal, my question is if the switch has been disabled the detector should be running as stock standard correct?, or could it possibly be running in either the dd or the mono mode? as I don't know what the added new components were fitted for?

I have sent this question to a couple of people who carry out the mods but have received no replies, so was wondering if anybody on here would have a circuit diagram for the mod or some idea as to what mode the detector would be running in now, thanks in advance

cheers

stayyerAU

Last edited by StayyerAU (27 February 2021 07:58 am)

#2

old hand
Member
From: golden triangle
Joined: 26 July 2014
Posts: 1,620
Member
27 February 2021 08:28 am

With a DD on the detector and putting the switch in mono its using the coil like a mono but you are only using a portion of the coil thumbsup


golden triangle

1 user likes this post: Reg Wilson

#3

IBGold
Newbie
Joined: 19 February 2020
Posts: 9
Newbie
27 February 2021 05:05 pm

Hi StayerAU have a look minelabmods for the circuit details for the switch for the SD2000 and a mint of other SD2000 Mod information the new components on the board would be either replacement parts or for another function as the switch uses no other components other than the switch and re routing of the coil plug to circuit board wiring any questions please ask I still have my SD2000M and would not part with it .

Regards, Ian. big_smile

StayyerAU wrote:

G'day

I have an Sd2000 that has had a mono and dd switch mod done to it, but the switch has been removed from it, there are stickers each side of the plugged switch hole with one saying DD low and the other saying MONO high, on opening up the box I can see that there are several components on the circuit boards that are new as they are unpainted, and several pins where I assume that the wires from the switch would have been attached, the detector is working and on testing it will run both dd and mono coils which seem to operate as normal, my question is if the switch has been disabled the detector should be running as stock standard correct?, or could it possibly be running in either the dd or the mono mode? as I don't know what the added new components were fitted for?

I have sent this question to a couple of people who carry out the mods but have received no replies, so was wondering if anybody on here would have a circuit diagram for the mod or some idea as to what mode the detector would be running in now, thanks in advance

cheers

stayyerAU

Last edited by IBGold (27 February 2021 05:07 pm)

#4

StayyerAU
Member
Joined: 30 March 2019
Posts: 325
Member
28 February 2021 04:30 am

old hand wrote:

With a DD on the detector and putting the switch in mono its using the coil like a mono but you are only using a portion of the coil thumbsup

Gday

Thanks for the reply, yes I know what the switch does and about using the dd in a pseudo mono mode, but as its been removed I just want to know how it was wired up?

cheers

stayyerAU

#5

StayyerAU
Member
Joined: 30 March 2019
Posts: 325
Member
28 February 2021 04:47 am

Hi Ian

I have scoured the minelab mods site and have seen the gpm mods but cant find any reference to the dd to mono switch wiring, just trying to get some idea how it connects up?, also I wondered about the other new components that have been fitted, it looks like 2 of the parts are replacement crystals and another looks to be a resistor, I am starting to wonder if the guy I bought it off was messing with it himself as he told me that he bought it as is and that the previous owner bought it brand new and that as far as he knew it was as stock standard and they never had it modified which obviously is not the case as someone has been inside it.

Like I said it seems to work as normal when a dd coil is fitted and also when a mono coil is fitted, I was considering getting the depth mod done to it but initially just want to try it out first to see how it performs as is, been years since I used an Sd in the field, also want to experiment with the concentric coils as well, just trying to get a handle on what was done to it, but alas no one who does these mods wants to get back to me about it?..

cheers

stayyerAU

#6

old hand
Member
From: golden triangle
Joined: 26 July 2014
Posts: 1,620
Member
28 February 2021 09:33 am

As you say just use it see how it goes ,if it was mine the only mod that would be done is a 4 or 6 poison frequency switch ,had it on my 2000 and it worked well regards john thumbsup


golden triangle

#7

IBGold
Newbie
Joined: 19 February 2020
Posts: 9
Newbie
28 February 2021 04:10 pm

Hi StayerAU it is on that site but as I have not been on it for years I can not tell you where exactly I have all the mod information if you want to PM me with your email details I can send you the information if you have someone who can do the work I can send you the various mod information as well my SD2000M has 12position crystal switch or processor controlled timings as well as the GPM mod and various other changes but I went a bit over the top.

OK I just had a look if you go to Minelab mods click on DIY and click on Mod diagrams it will give you the various DD/Mono switch diagrams cheers.

Regards, Ian. big_smile

StayyerAU wrote:

Hi Ian

I have scoured the minelab mods site and have seen the gpm mods but cant find any reference to the dd to mono switch wiring, just trying to get some idea how it connects up?, also I wondered about the other new components that have been fitted, it looks like 2 of the parts are replacement crystals and another looks to be a resistor, I am starting to wonder if the guy I bought it off was messing with it himself as he told me that he bought it as is and that the previous owner bought it brand new and that as far as he knew it was as stock standard and they never had it modified which obviously is not the case as someone has been inside it.

Like I said it seems to work as normal when a dd coil is fitted and also when a mono coil is fitted, I was considering getting the depth mod done to it but initially just want to try it out first to see how it performs as is, been years since I used an Sd in the field, also want to experiment with the concentric coils as well, just trying to get a handle on what was done to it, but alas no one who does these mods wants to get back to me about it?..

cheers

stayyerAU

Last edited by IBGold (28 February 2021 04:17 pm)

#8

AuMan
Member
Joined: 16 March 2014
Posts: 208
Member
01 March 2021 12:48 pm

Hi StayyerAU,

Saw your post here and went digging in my email.
Apologies for not replying to your email sooner, Gmail had kindly filed it in my promotions folder.

So to make this thread complete, I'll also answer your mono DD switch question here.

The Mono DD switch was for DD coils, so you could opt to use the transmit half of the coil as a mono coil, thus the DD then behaves like a mono.

Most likely if the switch has been disconnected it should be running as standard, so a DD should be a DD and a mono a mono.
To verify that, the yellow receive wire should be connected to pin 2 of the coil plug.
Pins 1 & 5 linked to black,
pins 4 & 3 linked to red
The switch would have had the yellow wire to the centre terminal and then the edge terminals connected to the red(for mono) and pin 2 for DD(std mode).

For the replaced components, there were some found that would make the threshold a little smoother, but without seeing which parts, it is hard to tell.

There has been a lot of DIY information out there for a long time now for 2000 mods, so most likely someone did it themselves.

Cheers Mick

1 user likes this post: bicter

#9

IBGold
Newbie
Joined: 19 February 2020
Posts: 9
Newbie
01 March 2021 04:39 pm

Hi StayerAU,

There you go Mick is the man if you do want to get more done to your SD2000.

Hi there3 Mick how's it going.

Regards, Ian. big_smile

#10

AuMan
Member
Joined: 16 March 2014
Posts: 208
Member
01 March 2021 10:18 pm

IBGold wrote:

Hi StayerAU,

There you go Mick is the man if you do want to get more done to your SD2000.

Hi there3 Mick how's it going.

Regards, Ian. big_smile

Hi Ian, good to hear from you, it's been a while since we last chatted.
Moved house last year and now living right in the heart of the triangle.
Now that I can walk out my door and test detectors in nice hot ground, I have been taking the time to go back over my mods and find new little improvements and test/prove them quickly. I have managed to get some more sensitivity and depth out of the f1a4 and 2200, the gp/gpx series quieter and starting to add manual tune as well(to detectors that only have auto) which seems much better than waiting for the auto tune to not tune out the emi! I am hoping to do some more videos soon showing all the improved mods in action.

Hope you are keeping well.

Cheers Mick

1 user likes this post: Reg Wilson

#11

gef12
Member
Joined: 12 July 2013
Posts: 112
Member
02 March 2021 05:12 pm

ye what Ian and Mick said ..
nice to see you guys here again .. not been on for some time ..
hope all well ..

cheers
geoff

#12

PhaseTech
Phase Technical
From: Adelaide, SA
Joined: 29 May 2014
Posts: 2,110
Phase Technical
02 March 2021 11:39 pm

AuMan wrote:

The Mono DD switch was for DD coils, so you could opt to use the transmit half of the coil as a mono coil, thus the DD then behaves like a mono.

Hey Mick, just to clarify, did this coil switch mod make the coil transmit and receive off the Tx winding only, or did it receive off both Tx and Rx windings as it does in the GP and GPX's?

I was a big fan of the Mono mode on GP's, as running a DD coil in Mono meant that I kind of got a happy compromise between sensitivity and signal sharpness, and retaining some DD characteristics such as ground handling and reduced EMI.

Look forward to your videos.


Agent for Minelab, Nugget Finder, Nokta Makro, Quest, Detech, SteelPhase - Phase Technical Website
Digging with PhaseTech on YouTube

#13

AuMan
Member
Joined: 16 March 2014
Posts: 208
Member
03 March 2021 04:21 pm

gef12 wrote:

ye what Ian and Mick said ..
nice to see you guys here again .. not been on for some time ..
hope all well ..

cheers
geoff

Hi Geoff,

All is well! It's starting to cool off a bit here so will hopefully get some more time out detecting now.
Bought a 2200 a while ago with the intention of being my guinea pig. It came with one of your Treasure Mate powered speakers which still works a treat.
Anyway took the detector out yesterday having done what I wanted to do with it and found a nice surfaced area near Tarnagulla that has had every man and his dog over it. It was well flogged! No shotgun pellets, didn't dig any rubbish. After about half hour I got a nice little signal and pulled up a whopping 0.02~0.03g speck of flypoop! I won't call it a nugget!1614748558_0.03g.jpg

Hope you are well and still getting out to find a bit..

Cheers

2 users like this post: Ded Driver, Reg Wilson

#14

AuMan
Member
Joined: 16 March 2014
Posts: 208
Member
03 March 2021 04:33 pm

PhaseTech wrote:
AuMan wrote:

The Mono DD switch was for DD coils, so you could opt to use the transmit half of the coil as a mono coil, thus the DD then behaves like a mono.

Hey Mick, just to clarify, did this coil switch mod make the coil transmit and receive off the Tx winding only, or did it receive off both Tx and Rx windings as it does in the GP and GPX's?

I was a big fan of the Mono mode on GP's, as running a DD coil in Mono meant that I kind of got a happy compromise between sensitivity and signal sharpness, and retaining some DD characteristics such as ground handling and reduced EMI.

Look forward to your videos.

Hi Nenad,

On the SD the switch makes the coil receive from the Tx winding only. The sd receiver is a single channel(receiver) only. The GP(x) series have 2 receivers that receive from both tx and rx coils at the same time and then, depending on the coil switch position, the received signals are either added(mono), subtracted(cancel), or single receive channel(DD).

Cheers Mick

1 user likes this post: PhaseTech

#15

gef12
Member
Joined: 12 July 2013
Posts: 112
Member
10 March 2021 01:50 pm

AuMan wrote:
gef12 wrote:

ye what Ian and Mick said ..
nice to see you guys here again .. not been on for some time ..
hope all well ..

cheers
geoff

Hi Geoff,

All is well! It's starting to cool off a bit here so will hopefully get some more time out detecting now.
Bought a 2200 a while ago with the intention of being my guinea pig. It came with one of your Treasure Mate powered speakers which still works a treat.
Anyway took the detector out yesterday having done what I wanted to do with it and found a nice surfaced area near Tarnagulla that has had every man and his dog over it. It was well flogged! No shotgun pellets, didn't dig any rubbish. After about half hour I got a nice little signal and pulled up a whopping 0.02~0.03g speck of flypoop! I won't call it a nugget!https://www.prospectingaustralia.com.au/forum/img/member-images/2670/1614748558_0.03g.jpg

Hope you are well and still getting out to find a bit..

Cheers

Ye Mick .. dry season approaching here .. cant wait to get out ..
Yes there is a few of the TM about ..
was down at Tarnagulla many years ago .. there is a deep shaft there not far out of town .. near entrance was a quartz boulder ... specking that was some
colour would you believe .. so made a trip to town for a 7 lb sledge hammer ... bang bang bang couple of hours just to release it ..
The boulder probably still there and now would be a mad rush on to that spot .. lol good luck smile

nice to hear from you ...
cheers

#16

Adrian ss
Member
Joined: 08 December 2018
Posts: 271
Member
12 March 2021 04:55 pm

AuMan wrote:
gef12 wrote:

ye what Ian and Mick said ..
nice to see you guys here again .. not been on for some time ..
hope all well ..

cheers
geoff

Hi Geoff,

All is well! It's starting to cool off a bit here so will hopefully get some more time out detecting now.
Bought a 2200 a while ago with the intention of being my guinea pig. It came with one of your Treasure Mate powered speakers which still works a treat.
Anyway took the detector out yesterday having done what I wanted to do with it and found a nice surfaced area near Tarnagulla that has had every man and his dog over it. It was well flogged! No shotgun pellets, didn't dig any rubbish. After about half hour I got a nice little signal and pulled up a whopping 0.02~0.03g speck of flypoop! I won't call it a nugget!https://www.prospectingaustralia.com.au/forum/img/member-images/2670/1614748558_0.03g.jpg

Hope you are well and still getting out to find a bit..

Cheers

So there is no need for me to buy a 7000 when a 2200 can find 0.02 g. big_smile big_smile


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