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A ballast resistor is necessary to run a bare laser tube. (Lasers that are in a metal head will have one built in.) It must be placed in series with the anode lead within 3" of the tube. Dale CW-10, 50K ohm, 10 Watt wire wound ballast resistor. Recommended for large HeNe laser tubes that operate up to 14mA.
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A ballast resistor is necessary to run a bare laser tube. (Lasers that are in a metal head will have one built in.) It must be placed in series with the anode lead within 3" of the tube. Dale NS-5-69, 20K ohm, 5 Watt, non-inductive wire wound ballast resistor. Recommended for HeNe laser tubes that operate up to 15.8mA.
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A ballast resistor is necessary to run a bare laser tube. (Lasers that are in a metal head will have one built in.) It must be placed in series with the anode lead within 3" of the tube. Dale RS-10, 100K ohm, 10 Watt wire wound ballast resistor. Recommended for large HeNe laser tubes that operate up to 10mA.