"Thomas" wrote in news:bfhdpk
:

In one of Japanese expert site who is good in repairing vintage audio
equipment, (see link below), he has mentioned use of a higher price BP
to
replace old capacitor? Does anyone know what does this BP means?


BP means bipolar. Here in the US we call them non-polar or NP capacitors.
They can take DC either way, as opposed to conventional (polar)
electrolytic capacitors that have positive and negative leads.

Note that those caps in photo 5C are pairs of regular electrolytics
placed in series, back to back, positive to positive.

In photo 5D each pair of regular caps is replaced with one non-polar cap.
The non polar cap should have half of the capacity of each of the caps it
replaces. So a pair of 10uF caps would be replaced by one 5uF non-polar.

Non-polar caps are not necessarily expensive. They are used in speaker
crossovers.

http://dkc3.digikey.com/pdf/T032/0655.pdf

http://www.partsexpress.com/webpage....&WebPage_ID=72

Tim