Differents Of the "DVR134" & "BOSOZ" - diyAudio
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Old 26th January 2005, 04:41 PM   #1
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Default Differents Of the "DVR134" & "BOSOZ"

Anyone, can tell more the different in between the "DVR134"
and "BOSOZ".

Where I can get the schematic and PCB layout for DVR134 ?

If, using OPT, how is the wiring and values (p-p) ?

Thanks !
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Old 26th January 2005, 04:52 PM   #2
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DRV134.
BOSOZ, (second item down the page).
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Old 26th January 2005, 07:03 PM   #3
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DRV134 is an IC that converts a single-ended signal to differential. The BOSOZ is an entire preamp that can run single-ended to balanced, balanced to single-ended, balanced to balanced, or single-ended to single-ended (i.e. any combination you like).
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Old 26th January 2005, 07:49 PM   #4
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The circuits are like night and day. I leave it to you
to figure out which is which.
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Old 26th January 2005, 07:58 PM   #5
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I vote for the BOSOZ as night, after all, the fun starts when the lights go out!
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Old 26th January 2005, 08:10 PM   #6
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Oh yeah, I should mention that I just finished building a modified BOSOZ (all modifications suggested by Mr. Pass), and it is a simple circuit to build, and it is very impressive. In the last three days since I got it up and running, I've spent more time enraptured by music than I have spent listening to it it within the last three years.
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Old 26th January 2005, 10:03 PM   #7
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Hail MetalMan:

Lately I have received a number of requests by
guys who want to use it as a se to balanced
converter. Would you like to post your schematic?
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Old 27th January 2005, 01:00 AM   #8
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Why do I suddenly feel WAY to big for my britches.

Well, thank you very much for suggesting that my schematic is worthy of consideration. As to posting it ... well ... actually I already have HERE

Now I gotta go find where my socks landed after they got knocked off.

EDIT:
Forgot to mention, of course, that to use as a converter, you need to connect the negative signal terminal of the single-ended side.
i.e. if SE input, ground -in, if SE ouput, ground -out.
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Old 23rd February 2005, 08:06 AM   #9
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I have studied your schemtic, thank you very much !

Other questions :
a)What is the gain of the line-amp, how to calculate it ?

b) If I use it as SE input and SE output, will the sound get worse due to the somethng like "Half Load" ? Someone said in such case,the unused o/p should loaded with a "R & C".

c) Do you have the PCB layout ?

Best Regards !
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Old 23rd February 2005, 06:33 PM   #10
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Quote:
What is the gain of the line-amp, how to calculate it?
The gain of my posted circuit is just a hair over 13dB. I don't have an exact way to calculate it, but it is roughly related the ratio of feedback to input resistor, i.e. (R15+R19)/R19. The actual circuit gain is about 2dB below that calc.

Quote:
If I use it as SE input and SE output, will the sound get worse due to the somethng like "Half Load" ? Someone said in such case,the unused o/p should loaded with a "R & C".
With my BZLS I just simply ground the negative input and output when I use SE on both ends. If there is a performance penalty to doing so, I haven't been able to detect it. That being said, I don't know if there is any benefit to loading the negative output. Perhaps others more knowledgable could comment.

Quote:
Do you have the PCB layout ?
Nope. It is a pretty simple circuit, and I only planned on building it once, so I didn't bother with the effort of creating a PCB and just built it on perfboard. I do have a layout for that, which is attached below.

Cheers, Terry
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File Type: jpg cc-ccs-x-bzls-layout.jpg (88.9 KB, 567 views)
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