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topic 7649

Need Thum Cell Voltage


What is the best voltage to run a Thum Cell and what is the reasonable maximum current density of the cathode?

Sandra Wilson
-Melbourne, Victoria, Australia


Thum Cells are usually run at voltages from 3 volts to 4.4volts. I've found 3 volts works well. Current density - amps per sq. foot (anode) 50 to 60. If Tartaric acid is needed to improve the density of the Ag crystals, use sparingly - 1/4 teaspoon per cell at a time, give it a day or two before adding more. If too much tartaric acid is added, the silver will be like concrete on your cathode.

Good luck & Best regards,

Jim Sivertsen
- Alden N.Y. U.S.A.

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