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Hello.
I'm new to the forum.
I'm in France. I have a classic 3 slx for many years (1999).
The Classic 3 SLX is made factory with the "ground balance". see image
I learned that it was possible to make the following changes:
1) Replace resistor R24 with a 2.2 Meg. You could have either a 470k or a 1.5 Meg there depending on when the unit was manufactured.
2) Check resistor R7. If it’s not a 51 ohm resistor, replace it with one of that value. It’s most likely a 100 ohm from factory. Later manufactured units had 51 ohms.
3) S.A.T changes. R32 220k resistor can be changed out. Raising the value been installing a 375k running it through a toggle switch with the 220k.
4) Threshold: Remove VR4 trimmer off the board replacing it with a 100k linear taper, single turn potentiometer.
Yes but……
5) Ground balance: Remove VR1 Trimmer off the board. Replace with a 50k linear taper, single turn potentiometer.
Should I make this change knowing that my detector already has a "ground balance"? See photo
Risk of malfunction or inconsistency if I add this mode?
Thank you for the help you can give me the achievements of these mods (Documents, photographs, schematic...).
Tial
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