Please help identify funny CAPACITOR type identifier.

[Al]

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 !

[Sander deWaal]

(Al) said:

>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).

Dunno what PLAQ means, but in that place I'd use styroflex caps.
Siemens makes a large range of them in the pF to nF range.

--
Sander deWaal
"SOA of a KT88? Sufficient."