Pass B1 clone. Configure for some gain? - diyAudio
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Old 11th October 2014, 12:48 PM   #1
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Default Pass B1 clone. Configure for some gain?

Was wondering if anyone had any ideas about this.

I have a Pass B1 buffer clone (the version with the green 2008 R0 circuit board) and was wondering if there is any way to wire it so it gives some gain?

If anyone has any ideas I'd love to hear from you.

Cheers
Colin
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Old 11th October 2014, 12:56 PM   #2
Zen Mod is offline Zen Mod  Serbia
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no way , Josť



for gain , include JFet BOZ in front of it
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Old 13th October 2014, 01:45 AM   #3
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Sorry for the dealy in replying and thanks for the info.

The JFet Boz looks good. Plenty of gain. Might as well use it without the B1 afterwards. Do you know if the boards on Ebay alright to use?

Cheers,
Colin

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no way , Josť



for gain , include JFet BOZ in front of it
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Old 13th October 2014, 06:13 AM   #4
Zen Mod is offline Zen Mod  Serbia
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sorry , I never looked

make it on Veroboard
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Old 13th October 2014, 04:09 PM   #5
dazed2 is offline dazed2  Canada
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Following up on ZM's suggestion, I have a question.
Is there a reason to have the JFet BOZ with the B1 behind it?
Since the JFet BOZ already is pretty much a pre-amplifier circuit, is there any reason to have a buffer in the way?
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Old 13th October 2014, 04:45 PM   #6
Fenris is offline Fenris  United States
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JFET BOZ has a high output impedance. The buffer improves it by giving it a low impedance.
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Old 14th October 2014, 06:56 AM   #7
Hikari1 is offline Hikari1  United States
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You don't need veroboard or a pcb. It's a pretty simple circuit.
Attached Images
File Type: jpg 20130522_224432.jpg (499.0 KB, 215 views)
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File Type: pdf jfet boz small-1.pdf (25.8 KB, 47 views)
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Old 15th October 2014, 11:22 AM   #8
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Looks like an ideal solution for getting some extra gain for my b1 and phono stage, in need of some gain.

What is the gain from this? And would you recommend a good value for the caps?

Appreciate your feed back on the performance of the BOZ

Cheers
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Old 15th October 2014, 02:29 PM   #9
BigE is offline BigE  Canada
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Quote:
Originally Posted by Zen Mod View Post
no way , Josť



for gain , include JFet BOZ in front of it
What do you do with the pots of the BOZ/B1?
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Old 15th October 2014, 02:48 PM   #10
Zen Mod is offline Zen Mod  Serbia
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pot is always in front

so , selector - pot - BOZ - buffer
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