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Proving Unit Recommendations

So what make of proving unit(s) are you using and any issues with it/them?


Thanks.


F
Parents
  • I still use a Drummond incandescent test lamp.

    Proving unit is home made and consists 11 batteries each 9 volts connected in series.
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  • I still use a Drummond incandescent test lamp.

    Proving unit is home made and consists 11 batteries each 9 volts connected in series.
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