Testing Condenser Insulation

Radio Record, Volume II, Issue 31, 15 February 1929, Page 28

Testing Condenser Insulation

FIxep, condensets a¥é worse than useless in a receiver unless their internal ingulation-is sound. This is specially impottant in H.T. battery shunting condensers, and those wha have electric supply mains available can test any doubtful condensers in the following way. Cut one of the leads to a lamp, leaving the other lead intact, and connect the ends of the

cut lead to the terminals of the condenser. The lamp and condenser are then in series, aid when the switch is put on, the lamp sheuld not light if the condenser di-electric is sound. Any fixed condensér should bé able to withstand safely the 220 volts of the mains, so that no damage will result from the test. In the event of a fault in the dielectric, and 4. consequent contact between two adjacent plates of the condenser, the lamp will light, acting as a safety resistance, ee --