Shadow X2 mods.

[ShadowX2]

I'm looking at putting a manual GB on my X2. Is it as straightforward as it looks, is my question?

There's a 100K trimpot on the PCB with the three wires (one of which appears to be a dummy connected to nothing; if I just buy a 10 turn 100K surface mount pot, other than shoehorning it in the case, or alternatively going out of the side of the case, I can't really see any problems. I can snip it off, solder two wires to the remains of the legs on the board and I figure I'll be good to go.

Sound about right? Or will I need to do the threshold one as well, which also has a dummy wire on it?

[Carl-NC]

Yup, just replace the trimpot with a regular pot. A 10-turn is a really tight fit, Tesoro uses a 3-turn instead.

- Carl

[ivconic]

Somebody, somewhere said X2 is actually Silver Sabre? Right or wrong?
If right, than you can use Silver's schematic and examine a bit more your X2...

[ShadowX2]

Somebody, somewhere said X2 is actually Silver Sabre? Right or wrong?
If right, than you can use Silver's schematic and examine a bit more your X2...

Thanks for the confirmations, I've done the g/b mod and also put an external threshold control on. Funny thing is, the threshold pot (although it only seems to have two wires connected to anything) all three are needed to get a threshold just in case anyone else tries this job. I'm not an electronics guy, but I guess there must be a connection of some sort inside the board.

Thanks again

[Qiaozhi]

Thanks for the confirmations, I've done the g/b mod and also put an external threshold control on. Funny thing is, the threshold pot (although it only seems to have two wires connected to anything) all three are needed to get a threshold just in case anyone else tries this job. I'm not an electronics guy, but I guess there must be a connection of some sort inside the board.

Thanks again

It might be a 4-layer board. In which case the seemingly unconnected wire is probably attached to the ground plane.
You could try a continuity test, if you're curious.

[ShadowX2]

It might be a 4-layer board. In which case the seemingly unconnected wire is probably attached to the ground plane.
You could try a continuity test, if you're curious.

Well I'm wondering now about running the third wire from where the ground trimpot was attached. Although the GB works ok with just the two wires I may need to do that to make it right

[Qiaozhi]

Well I'm wondering now about running the third wire from where the ground trimpot was attached. Although the GB works ok with just the two wires I may need to do that to make it right

If this is the same (or close to) the Tesoro Silver Sabre, then there are only two connections on the ground balance control.

[ivconic]

Correct, Tresh need 3 wires and GEB only 2...
Agree...

[ShadowX2]

If this is the same (or close to) the Tesoro Silver Sabre, then there are only two connections on the ground balance control.

I'm pretty certain it's the same basic board as they use throughout the U Max range, but I'm the blind leading the blind. Finished mod attached anyway. Will probably sort the all metal/disc button with a trigger once I find an on/off toggle.

Might even take the coin check off and replace with a second disc too.

[Sean_Goddard]

The X2 IS/was indeed a Silver uMax.

The ONLY difference was the search head which was a very accurately balanced concentric. If you can find one of these, try it on a standard Tesoro, say a TGS and you will be amazed at the depth increase. A good 5 inches in air over a standard 8" polo coil.

The Coincheck is just a second disc pot (internal trimmer) set to around "6" on the scale (a la Fisher 1266). I have added these to MANY Silver Sabres for people over the years.

[ShadowX2]

I've got the slimline 9" and that's pretty deep, never tried the stock 7". I use the 7" Tesoro widescan and these mods will enable me to tune it to the coil a bit easier

Next is an armrest battery pack 6 rechargeable AA. I can then modify/change the control box, drop the PCB a bit and put a 10 turn pot in for gb and add the second disc with the extra space.

[Max]

The X2 IS/was indeed a Silver uMax.

The ONLY difference was the search head which was a very accurately balanced concentric. If you can find one of these, try it on a standard Tesoro, say a TGS and you will be amazed at the depth increase. A good 5 inches in air over a standard 8" polo coil.

The Coincheck is just a second disc pot (internal trimmer) set to around "6" on the scale (a la Fisher 1266). I have added these to MANY Silver Sabres for people over the years.

Hi,
can you post a picture of this 8'' coil for the X2?

I'm interested in small stuff detection range, like with coins. Really it gains 5'' of in air detection over the standard uMax 8'' polo ???

Kind regards,
Max