"John Wilson" writes:

Thanks for the replies and suggestions. I'll try the light bulb and I will
also experiment with a few turns, ~5-10 of #12 fire connected to the output
of a Weller type resistance heating soldering gun.
John.

Just use the lamp. Choose one ~equal to the nameplate rating
of the growler.

When cold, the lamp will allow lots of current. But as it brightens, its
resistance goes up. So this tends to allow constant current through the
growler.



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