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BOSOZ balanced pre - for novice - questions
BOSOZ balanced pre - for novice - questions
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Old 26th January 2017, 06:24 AM   #21
andrea7617 is offline andrea7617  Italy
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Default Unbalanced Input

Last question.
I won't use balanced input. I use only unbalanced input. I read a Nelson Pass post

P1 in BoSoZ

when he says to put between unused input (minus - ?) and his ground a 221 ohm resistor.
I understood this solution using the same board of post n.18 (nelson original board). It is correct? See red circles.

Click the image to open in full size.[/IMG]
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Old 26th January 2017, 07:33 AM   #22
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BOSOZ balanced pre - for novice - questions
just put short (wire bridge , 0R) in place of R14 , then use solely +IN

nothing more is needed
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Old 26th January 2017, 07:46 AM   #23
andrea7617 is offline andrea7617  Italy
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Thanks Zen Mod!
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Old 27th January 2017, 06:22 AM   #24
andrea7617 is offline andrea7617  Italy
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Default BoSoZ gerber file

Could you kindly suggest me a site or a place where there is gerber file por that pcb?
Thanks
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Old 27th January 2017, 07:42 PM   #25
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BOSOZ balanced pre - for novice - questions
I believe you can find someone to make them from pdf

I'm not aware of Gerbers publicly published
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Old 31st August 2017, 09:23 PM   #26
andrea7617 is offline andrea7617  Italy
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Default Power transformer

Hallo, I have ordered all the parts on Digikey and now I'am choosing the power transformer. I use only one power transformer. Do you think that 100 VA 2x60V is enough? May I choose a more powerful transformer? Thank you!!!
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Old 31st August 2017, 09:35 PM   #27
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BOSOZ balanced pre - for novice - questions
even 50VA is plenty enough
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Old 31st August 2017, 09:45 PM   #28
andrea7617 is offline andrea7617  Italy
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Thanks Zen Mod!In effect Nelson Pass says to use two transformers 30 w each so 100 VA is more than necessary. Reading some discussion I read that 100 VA (for both channel) is minimum (???) and some people use 160 VA or more...So I asked you!!! Now I will order 100 VA transformer (for both channel)!
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Old 31st August 2017, 09:51 PM   #29
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BOSOZ balanced pre - for novice - questions
Nelson simply used what he had on shelve or could buy easiest ....... no need for two xformers

50VA is more than enough for stereo BOSOZ , 100VA is even better

of course , you can use even 1KVA ........ be sure to put it in other room
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Old 31st August 2017, 09:59 PM   #30
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Perfect! 100 is good!!! I used 600 for Alep 30...
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