0024A TESTING CAPACITOR ATTRIBUTES

This service note will provide a method to test the change in capacity with varying voltage and compare the Ceramic and Polypropylene capacitors.  Also, we will demonstrate the aging effect and restoration of a Ceramic capacitor.

As you view the following tests, carefully watch for the effect that varying the voltage has on the capacity.  

TEST SETUP

Test 1:

.001uf 630v Polypropylene capacitor.

Note the capacity does not change as the 

voltage is increased.                             

TEST VIDEO

TEST 2:

.01uf Ceramic capacitor removed from a Hallicrafters SR-2000.  Note it has lost 25% of it's capacity through the aging process.  Also note the dramatic loss of capacity with applied voltage.

TEST VIDEO OF .01uf CERAMIC CAPACITOR

TEST 3:

.01uf Ceramic capacitor --- same as TEST 2 but baked at 150C for 40 minutes.  Note the capacity is restored to slightly above the original value, reversing the aging process.

TEST VIDEO OF .01UF CERAMIC CAP ABOVE RESTORED