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

malisz · 26th September 2003, 04:44 PM

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 · 29th September 2003, 05:14 AM

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 · 30th September 2003, 07:09 PM

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 · 30th September 2003, 08:02 PM

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 · 30th September 2003, 08:54 PM

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 · 2nd October 2003, 06:51 AM

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

26th September 2003, 04:44 PM	#1
malisz diyAudio Member Join Date: Feb 2003 Location: Warsaw	paper in oil vs. polyprop. caps for AlephP/BLSZ? 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

29th September 2003, 05:14 AM	#2
Super_BQ diyAudio Member Join Date: Sep 2001 Location: New Zealand / Canada	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 __________________ Yellow People for a Yellow World Vote for Super_BQ, the Asian Alternative

2nd October 2003, 06:51 AM	#6
ralf diyAudio Member Join Date: Dec 2001 Location: Germany	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

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30th September 2003, 07:09 PM	#3
malisz diyAudio Member Join Date: Feb 2003 Location: Warsaw	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.

30th September 2003, 08:02 PM	#4
fanta diyAudio Member Join Date: May 2003 Location: Poland	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

30th September 2003, 08:54 PM	#5
zygibajt diyAudio Member Join Date: Jun 2003 Location: Wroclaw	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

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