Hi, I am recently reading a schematics for a parametric filter for
audio application, and in service manual they have listed the type and
value of all the capacitors they uses. They have POLY ( for polyester
), ELEC ( for electrolytic ), and a mystery one called PLAQ. I wonder
if anyone can help me identify what type of capacitor that stands for.

These PLAQ capacitors are all in the range of a few hundred pF to a
couple of nF. Most of them are placed across the 'OUT' and the '-'
termainal of opamps ( together with other feedback components) .
Looking at the circuit board, they are greyish/light brownlish in
color and look very much like ceremic capacitors in size and shape
(they are all dipped with a color band on top).

Thanks.

you know what to remove to reply to !