those did not:

no matter the position of the poti, the output current did not change at all X-D #wtf is going on?

(power source was a “12V” solar panel delivering 20V which is in the allowed input range of those two transformers, that is actually 3x models that did NEVER work #wtf?)

try to find the working one at eBay via this search

(this one DID NEVER WORK neither did this one)

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