Quad ESL 57: electrical measurement (capacitance)

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Hello,
Did s.o. tried to measure capacitive value between diaphragm and one stator ?
Is there some useful info to derive from this measurement or will it be roughly the same whatever happens ?

My measurements: 200pF for a rebuilt bass panel, 550pF/360pF for an aged treble panel (outside strip/center strip). This later panel was rebuilt by a pro. and is somehow not in good shape currently (it makes hum: see my other post).

My feeling is that surface resistivity of coating may have some influence.

Thanks.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.