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Old 15th November 2003, 02:19 AM   #11
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Very nice job but those LED's are an insult to the master....... PLus the blue LED's do sound better.

Mark
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Old 15th November 2003, 06:31 AM   #12
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Hey Andy,

Cool layout and nice presentation.

If I am not mistaken, is that the relay input board from audiomania Pass Balanced line stage.

http://www.diymania.net/

I used the same design for my BOSOZ. It works very well!

macka
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Old 15th November 2003, 09:32 AM   #13
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Default use volume control by ALPS 5K Blue velvet

also i use relay board from www.diymania.net
and it works very well
i am connected input line directly and master volume used
alps 5k bluevelvet, just out-line

All FETS and resistor are very very hot..i can't touch more 3 second

BOSOZ SOUND IS REALLY REALLY EXELENT!!!!!!!!!!!!!!!!!!
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Old 15th November 2003, 11:30 AM   #14
PsykoK is offline PsykoK  France
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Hi,
Nice work!!

I use this relay Board too for the output selection, it's a good choice
Some pics:
Relay Board 1
Realy Board 2
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Old 16th November 2003, 05:10 AM   #15
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Default bzls testing?

Andy:

I also finished my BZLS and have completed the boards. I blew the board once, because the wrong connection. Now, I have fixed the boards. I have my PSU output to +/-60V, but how do you test the main board w/o connecting the wire?

I use the multimeter to measure, the only problem is that Z1, Z2 in both channels have different resistance value (R ch is 3 times higher than L ch). Is this the right way to test it this way?

Can you post the details photos of all the boards (or zip it up for us to download)?

Thanks

Thomas
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Old 16th November 2003, 09:08 AM   #16
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Default detail photo

hi..tomchaoda

I was made 100% same pcb work to Pass diy project from
http://passdiy.com/pdf/balzenpre.pdf

this photo is first version line board.
after i replace some parts ( resistor , capacitor )
FETS and zener diode are same part

My PSU out put to +59 , -60V , but its no matter
i think Z1,Z2 zenor is just protect to input signal
so please check about some resistor and FETs
As a matter of fact i didin't know exactly...^_^

good luck tomchaoda

thanks

Andy
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Old 16th November 2003, 01:17 PM   #17
PsykoK is offline PsykoK  France
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For the selection board see the following thread:
[BOSOZ] PCB fot the Audio input Selection board
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Old 18th November 2003, 09:35 AM   #18
Djomil is offline Djomil  Serbia
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Congratulations!!!!!
Very nice job, but I have one advice how to upgrade your sound. Use BLUE LED!!!!!!!!
Once again, excellent.

Greetings from Belgrade...
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