paper in oil vs. polyprop. caps for AlephP/BLSZ?

[malisz]

I have got 10 microF paper in oil caps. Old Polish military stock ca. 20 years old, but looking fine from the outside.
Is it a good idea to use in AlephP or BLSZ instead of polyprophylene caps

The option is for

malisz

 

[Super_BQ]

20 Years for paper oiled caps is getting pretty old. You have a capcitance meter to test them?

The beauty about polypropylenes is they can take a lot of abuse and will outlast any electrolytic. Ones probably 30 years old are still usuable today.

BQ

 

[malisz]

I do have a multimeter with capacitance measurement capability.

These caps are solded in a tinned metal boxes so there is no leaking effect and they have pretty robust voltage limits 380V.

The only things that I am worried about is the stability of the dielectric parameters and if paper in oil is likely to bring about any sonic improvements.

 

[fanta]

the old russian military caps are the best in this test. i think the polish caps are similar (like most things 20 years ago

http://home.elka.pw.edu.pl/~mgalach/audio/cap.htm

 

[zygibajt]

Hey man! What is your point???
Any kind of capacitors will work! paper in oil,polipropylene,film,electrolitics (bipolar ofcourse).What answer are you expecting here? The one that old polish paper in oil are the best in the world,absolutely go for them?
If youm happen to heve them,and they are in good condition I don't see any reason why you shouldn't use them.After all ,as I said before any kind of cap. will work (one better ,other worst soniclly).Then,after some time you might buy some good ,decent polypropylene caps. and compare both soniclly.
Bartek

 

[ralf]

old ones

Hi,

month ago i bought military paper in oil caps at 1 uF /2000V, which are form 1940 !! (60 years old)
i tested them as coupling capacitor in my amp against jensen, Mundorf etc.
the old ones sound really bad and coloured. that are my experiences with NOS.

Ralf