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Old 3rd September 2004, 10:46 AM   #1
diyAudio Member
Join Date: Aug 2004
Location: Stavanger
Default components identification

Anyone out there ready to help a novice?

3 questions ranging from easy to more advanced, easy first.

1. Electrolytics: If one of the terminals is marked with a stripe with a 0 in it, does that mean its non-polar?

2. Other capacitor (unknown type) marked: A/.1J250
I bought these a while ago for something, think I know what for but the marking is very confusing and I cant find the marking scheme on the net. Translation into plain english please.

3. Chip: SB61L256bs-8 ... Any ideas what it does?

Thanks everyone :-)
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Old 3rd September 2004, 11:51 AM   #2
diyAudio Member
Join Date: Jul 2003
Location: Newcastle, Australia
1. Stripe down side of electrolytic means negative terminal, so it is polarised. Non polarised caps usually have no stripe and "NP" on them.

2. Other cap is 0.1uf (100nF) 250V DC rating - probably polyester type.

3. Without doing a search on the number, it is probably a RAM (memory) chip, 256kB 8uS speed, possibly low power version ("L" in number).

Hope this helps

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Old 3rd September 2004, 01:21 PM   #3
diyAudio Member
Join Date: Aug 2004
Location: Stavanger
Default Thanks!

Thanks for that Centauri! Very useful info. Second cap was what I hoped it was. Can you explain the coding so I understand better?

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Old 3rd September 2004, 03:37 PM   #4
Apex Jr is offline Apex Jr  United States
diyAudio Member
Join Date: Jun 2002
Location: Torrance, Calif
To add a little on the above post:
The J = 5% ....... K = 10% and M = 20%
A at the beginning is probably the Manufacturer.
Steve @ Apex Jr.
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Old 4th September 2004, 04:28 AM   #5
diyAudio Member
Join Date: Aug 2004
Location: Stavanger
Default Resistors

All this is about two Quad 405-2 s which Im freshening up and modding (as well as a klipsch digital surround processor/preamp). The quads also have some 10 Ohm resistors which get very hot (so hot that the surrounding components are scorched) Im replacing them and moving them further from the board. Are the much bigger, wirewound type noisy in comparison with the ordinary little ones and can they be used in audio applications?

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