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#1

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
23 March 2019 06:31 pm

So in addition to the Zed, I have a modded SD2000, mainly as a "just in case" back up contingency smile
One thing I know nothing about at all is the DD/Mono switch. I flick it up or down and it doesnt seem to do much, except make the threshold louder.
It has a red button down at bottom of it...is that DD or mono when its down sad ???!!! Any help would be great!...
Pic:1553326229_s-l1600.jpg

Last edited by kingswood (23 March 2019 06:31 pm)


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#2

Redfin
Member
Joined: 26 February 2013
Posts: 2,889
Member
23 March 2019 07:13 pm

do you know who did the mod?
Woody or Barrie Johnson?


Det used - Whites 6000D, ML SD2000, ML SD 2001, ML SD 2200D, Garrett Infinium. Minelab SDC 2300. Minelab GPZ 7000.
Current Det - Garrett ASD Groundhog. . Minelab GPX 5000. Minelab GPX 4500.

#3

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
23 March 2019 08:00 pm

Johnson, thanks Redfin.


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#4

gef12
Member
Joined: 12 July 2013
Posts: 117
Member
28 March 2019 09:26 pm

if it has a dd mono switch it would be near the coil plug not the power plug as shown

Those to knobs side by side on the horizontal would be gain control for both channels i thing ..

small switch near the big one maybe internal amp on / off

just my thoughts

Gef

#5

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
29 March 2019 06:42 am

gef12 wrote:

if it has a dd mono switch it would be near the coil plug not the power plug as shown

Those to knobs side by side on the horizontal would be gain control for both channels i thing ..

small switch near the big one maybe internal amp on / off

just my thoughts

Gef

You may well be onto something thanks mate!...Yes it could well be an amp switch as it does seem to effect the threshold....The 2 knobs are tone and boost.
Someone did tell me the switch was a dd/mono switch, but could be completely wrong.


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#6

gef12
Member
Joined: 12 July 2013
Posts: 117
Member
31 March 2019 08:57 pm

so you should or may have 2 x extra volume type controls around the other side ...
if so they would be gain for both channels

#7

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
01 April 2019 07:48 am

no I dont sad Thiking logically about this now though, I wonder if the switch turns the boost on or off...I will try that when I have her plugged in next!


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

1 user likes this post: Jmoilz90

#8

Jmoilz90
Member
Joined: 01 November 2019
Posts: 15
Member
14 January 2020 01:10 pm

How did u go with that switch did you end up working out what it was ?

#9

kingswood
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Joined: 12 October 2017
Posts: 282
Member
21 January 2020 06:22 am

Jmoilz90 wrote:

How did u go with that switch did you end up working out what it was ?

Yep its a boost switch essentially. Turn it off and the treshold goes quiet, on and its loud smile

Last edited by kingswood (21 January 2020 06:23 am)


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#10

gef12
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Joined: 12 July 2013
Posts: 117
Member
21 January 2020 09:05 pm

as i thought ...

1 user likes this post: kingswood

#11

Jmoilz90
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Joined: 01 November 2019
Posts: 15
Member
08 February 2020 03:49 pm

Awesome ?? I’ve literally got the same machine modded by Johnson aswell and wasn’t to sure me self ??

1 user likes this post: kingswood

#12

mudgee hunter
Banned
Joined: 02 January 2017
Posts: 2,334
Banned
08 February 2020 05:20 pm

My cook has DD's! lol

Last edited by mudgee hunter (08 February 2020 05:20 pm)


Member of the "Banker Gang"

1 user likes this post: GaryO

#13

stevenj48
Member
Joined: 03 March 2018
Posts: 129
Member
10 June 2021 08:37 pm

does anyone happen to have any instructions for these mods? i have the same machine but not sure what all the nobs do.


Minelab SD2000M, Minelab SDC2300,Minelab Equinox 800,Minelab GP3500

#14

fwdoz
Member
From: Cranbourne North, VIC
Joined: 20 June 2020
Posts: 800
Member
10 June 2021 08:40 pm

stevenj48 wrote:

does anyone happen to have any instructions for these mods? i have the same machine but not sure what all the nobs do.

Do you know whose mod?

The well known modders should be contactable & put you on the right track


Dig like Indiana Jones!
Minelab GPX6000, Minelab GP3500, Minelab Gold Monster 1000, PMAV Member

#15

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
10 June 2021 09:28 pm

stevenj48 wrote:

does anyone happen to have any instructions for these mods? i have the same machine but not sure what all the nobs do.

Are they labeled?
Like this:
1623320887__20.jpg


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#16

stevenj48
Member
Joined: 03 March 2018
Posts: 129
Member
14 June 2021 10:14 pm

kingswood wrote:
stevenj48 wrote:

does anyone happen to have any instructions for these mods? i have the same machine but not sure what all the nobs do.

Are they labeled?
Like this:
https://www.prospectingaustralia.com.au … 87__20.jpg

Yes they are labeled Barrie Johnson mods but the bottom sensitivity switch has 6 clicks but only 4 labeled trying to figure out and not sure when and how to use boost i cannot get this machine run quiet even when using the 11 stock dd coil
can anyone share what settings they use with what coil to give me a starting point?


Minelab SD2000M, Minelab SDC2300,Minelab Equinox 800,Minelab GP3500

#17

stevenj48
Member
Joined: 03 March 2018
Posts: 129
Member
14 June 2021 10:44 pm

after making my last post i went out and played with the Sd200O

I have figured all out thanks to the comments in the post except for the sensitivity settings mine has seven clicks only numbered 1-4 but all seven seem to make a difference to the machine and i believe one may turn the sensitivity off do other people only have 4 clicks?

this is what i come up with

Small Switch - Amp On/Off
Large Switch - Power On/Off
Tone - Tone
Boost - Volume Control
Threshold - Threshold Volume
Sensitivity
0 - Sensitivity off
1-
2-
3-
4-
5-
6-

i have seen a sd2000 for sale referencing the Barrie Johnson 6 frequency mod maybe this could be one even though it is only labelled to 41623670990_bbbb.jpg


Minelab SD2000M, Minelab SDC2300,Minelab Equinox 800,Minelab GP3500

#18

kingswood
Member
Joined: 12 October 2017
Posts: 282
Member
15 June 2021 07:52 am

stevenj48 wrote:
kingswood wrote:
stevenj48 wrote:

does anyone happen to have any instructions for these mods? i have the same machine but not sure what all the nobs do.

Are they labeled?
Like this:
https://www.prospectingaustralia.com.au … 87__20.jpg

Yes they are labeled Barrie Johnson mods but the bottom sensitivity switch has 6 clicks but only 4 labeled trying to figure out and not sure when and how to use boost i cannot get this machine run quiet even when using the 11 stock dd coil
can anyone share what settings they use with what coil to give me a starting point?

When I had mine I usually ran it with the original channel selector in the middle (so both original channels) with the mod selector on 2 or 3, running with a 14" NF mono. The boost was usually low as I ran it thru a Lucy Lark battery and used the boost on that.
Amp switch was on.


"There’s no point detecting in ground that is too deep for the detector so I like to keep bedrock in sight at all times" Jonathon Porter 2014

#19

IBGold
Member
Joined: 19 February 2020
Posts: 10
Member
15 June 2021 04:29 pm

stevenj48 wrote:

after making my last post i went out and played with the Sd200O

I have figured all out thanks to the comments in the post except for the sensitivity settings mine has seven clicks only numbered 1-4 but all seven seem to make a difference to the machine and i believe one may turn the sensitivity off do other people only have 4 clicks?

this is what i come up with

Small Switch - Amp On/Off
Large Switch - Power On/Off
Tone - Tone
Boost - Volume Control
Threshold - Threshold Volume
Sensitivity
0 - Sensitivity off
1-
2-
3-
4-
5-
6-

i have seen a sd2000 for sale referencing the Barrie Johnson 6 frequency mod maybe this could be one even though it is only labelled to 4https://www.prospectingaustralia.com.au/forum/img/member-images/12130/1623670990_bbbb.jpg

Your six position that is marked sensitivity is actually a Timing switch it switches different crystals to adjust the timing the highest frequency crystal will be the most sensitive to small targets crystals can be from 1.000 MHz for large deep nuggets up to 4.000MHz for small nuggets my crystal switch has 12 positions.

Regards, Ian. big_smile

1 user likes this post: bushbasher90

#20

stevenj48
Member
Joined: 03 March 2018
Posts: 129
Member
15 June 2021 05:12 pm

IBGold wrote:
stevenj48 wrote:

after making my last post i went out and played with the Sd200O

I have figured all out thanks to the comments in the post except for the sensitivity settings mine has seven clicks only numbered 1-4 but all seven seem to make a difference to the machine and i believe one may turn the sensitivity off do other people only have 4 clicks?

this is what i come up with

Small Switch - Amp On/Off
Large Switch - Power On/Off
Tone - Tone
Boost - Volume Control
Threshold - Threshold Volume
Sensitivity
0 - Sensitivity off
1-
2-
3-
4-
5-
6-

i have seen a sd2000 for sale referencing the Barrie Johnson 6 frequency mod maybe this could be one even though it is only labelled to 4https://www.prospectingaustralia.com.au/forum/img/member-images/12130/1623670990_bbbb.jpg

Your six position that is marked sensitivity is actually a Timing switch it switches different crystals to adjust the timing the highest frequency crystal will be the most sensitive to small targets crystals can be from 1.000 MHz for large deep nuggets up to 4.000MHz for small nuggets my crystal switch has 12 positions.

Regards, Ian. big_smile

Thanks for the info Ian


Minelab SD2000M, Minelab SDC2300,Minelab Equinox 800,Minelab GP3500

#21

stevenj48
Member
Joined: 03 March 2018
Posts: 129
Member
Yesterday 10:46 am

Ok have had a response from Rohan (Barrie's Son)

From Memory position 1 & 2 are the 2 standard frequencies, normally you would have to remove cover and swap a link over to access those frequencies. Position 3 & 4 are 2 more frequency options that will slightly increase sensitivity in relation to small gold. The frequency options can also be used to reduce EMI (Interference) The Tone is just the Audio Tone. The Boost switch is an Audio Booster (Volume) this will only boost the Audio.

pretty much explains it all.


Minelab SD2000M, Minelab SDC2300,Minelab Equinox 800,Minelab GP3500


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