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For battery contacts for classic HP calculators, which version of Deoxit is best to use? Below is the one I have. Would I have a better result if I get Deoxit Gold?

The one I'm using seems to be of limited benefit.
I currently have five flavors of DeoxIT in my arsenal.

D100L: Red, Cleaner, 100% concentration, liquid
D5: Red, Cleaner, 5%, aerosol
G100L: Gold, Preservative, 100%, liquid
G5: Gold, preservative, 5%, aerosol
Battery cleaner: Red, D100 liquid, incl. applicators

The aerosols were acquired first and work well on things like old TV tuners. For our restoration projects the brush-on liquid is a lot less messy.

For battery contacts the D100 or the D100 battery cleaner followed by G100 preservative is the way to go.

If that doesn't do it, check out this thread from EEVBlog:

Corrosion removal and protection.

  1. Clean corrosion mechanically if possible, I use dental picks, toothpicks, fibre glass pen.
  2. immerse in vinegar or diluted vinegar avoiding LCD and LED panels.
  3. Use DeOxit Red if corrosion was visible or suspected but not visible, such as under ICs or other electronic components.
  4. DeOxit gold for good clean machines I want preserved.
  5. DeOxit green on fader controls (not trimming capacitors but okay on variable resistors).

(04-13-2017 05:48 PM)Geoff Quickfall Wrote: [ -> ]
  1. DeOxit green on fader controls (not trimming capacitors or variable resistors)

I agree about not using DeoxIT F-Series (green) on trimming caps, but one of the listed uses is "carbon-based controls (potentiometers)" which is a variable resistor.
Oops, my mistake. Was thinking about changing the resistance values but of course it does not!
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