[BOSOZ] PCB fot the Audio input Selection board - diyAudio
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Old 31st October 2002, 12:35 PM   #1
PsykoK is offline PsykoK  France
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Default [BOSOZ] PCB fot the Audio input Selection board

I plan to build a BOSOZ and this case I choose to use the Audio Input Selection Board from Seungyun Lee.
You can see some pics from his job here:
http://www.passdiy.com/gallery/zenpre-p1.htm

or here for the full project ( attention the site is in Korean):

www.diymania.net


The problem was that for this board, he has made the PCB layer by hand and the scanned pics are not in a sufficient quality to make some good PCB:
Top:
Click the image to open in full size.


Bottom
Click the image to open in full size.


My board design is not new, is the same as the original one. The board was designed with EAGLE and looks like that:
Click the image to open in full size.

In the attached file you find all EAGLE files and a copy in Gerber format!


The part list and the wire plan are available here:
part list
wire plan


Alex
Attached Files
File Type: zip ais.zip (71.9 KB, 374 views)
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Old 31st October 2002, 12:44 PM   #2
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If you are really serious about your design, you might go one step further and mount relays directly to RCA jacks, still using PCB. Something like that:
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File Type: jpg rel.jpg (51.1 KB, 1834 views)
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Old 31st October 2002, 01:03 PM   #3
zeno is offline zeno  Europe
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What kind of relays did you use, Peter ?

Any surrounding logic?

Marc
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Old 31st October 2002, 01:15 PM   #4
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I think those are Swiss Altel. I bought them years ago surplus. No logic, just hardwired switching.
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Old 31st October 2002, 01:17 PM   #5
zeno is offline zeno  Europe
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nothing fancy about these relays. Goldplated, inert gas etc ?

Do they harm the sound quality ?
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Old 31st October 2002, 01:22 PM   #6
PsykoK is offline PsykoK  France
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Quote:
Originally posted by Peter Daniel
If you are really serious about your design, you might go one step further and mount relays directly to RCA jacks, still using PCB. Something like that:
Yes it's an other good idea and it's maybe easier to build, thanks !
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Old 31st October 2002, 01:23 PM   #7
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I saw them in FM Accoustics equipment so I thought they must be pretty good. Of course, it was 8 years ago. These days I would do extensive testing regarding sonic signature, but, I didn't bother then.
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Old 31st October 2002, 01:24 PM   #8
PsykoK is offline PsykoK  France
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Quote:
Originally posted by zeno
What kind of relays did you use, Peter ?

Any surrounding logic?

Marc
You can found some good relay by www.schuro.de for an interesting price:
http://www.schuro.de/preisl-relais.htm
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Old 31st October 2002, 01:31 PM   #9
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So here is the rest. The active part is potted and mounted directly behind the relays. Beside the active module, there is another module with 10 relays, which swtch the feedback resistors, changing the gain from 10dB to 20 dB.
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File Type: jpg pre.jpg (42.9 KB, 1716 views)
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Old 31st October 2002, 01:34 PM   #10
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More:
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File Type: jpg pre1.jpg (47.6 KB, 1560 views)
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