Kripton

is an esr meter repository to choose from a schematic to build your own
esr meter !

http://kripton2035.free.fr/esr-repository.html


** Anyone who needs to check the ESR of a few electros can lash up a test
rig in seconds - all you need is a bench audio generator and a basic scope
or CRO as poms and Aussies like to call them.

Set the audio gen to about 100kHz and connect the output across the electro
under test - then connect the scope probes direct to the same cap ( not the
generator). You should see a small voltage at 100kHz on the scope.

By comparison with known good electros of similar ratings, one can note the
residual voltages and determine if a given electro is OK.

Tests can be done while the electro caps are still in circuit - but be
careful to make sure they are fully discharged first !!!



...... Phil