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UNI33 Matrix Mixer - R8?

UNI33 Matrix Mixer - R8?

2013-12-06 by acousmatique

I am building this for someone, and I don't see any formula for determining R8. Since the parts list says 8x 100k for each column, can I safely assume that 100k is the default value for these resistors? Do these set the gain for each amp?

Thanks! Happy to be building again
CJ

Re: UNI33 Matrix Mixer - R8?

2013-12-06 by charles kerr

Hi CJ,

Do you mean RB? That is listed as 100k for the A board, and I would say 100K for the B board too, 100k all round! The circuit is very similar to the DC mixer - CGS 04...

Charlie


http://loudestwarning.tumblr.com/

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On Fri, 6/12/13, acousmatique@... <acousmatique@...> wrote:

Subject: [cgs_synth] UNI33 Matrix Mixer - R8?
To: cgs_synth@yahoogroups.com
Date: Friday, 6 December, 2013, 19:10


























I am building this for someone, and I don't see
any formula for determining R8. Since the parts list says 8x
100k for each column, can I safely assume that 100k is the
default value for these resistors? Do these set the gain for
each amp?

Thanks! Happy to be building again
CJ

Re: UNI33 Matrix Mixer - R8?

2013-12-06 by acousmatique

Hi Charlie,


Yes, it might very well be RB. My eyes are straining. The counts did suggest 100k, but I am guessing that since they are not labeled as such, there might be other options. I will probably just go with the 100k value.


Thanks for the quick reply!

CJ

Re: UNI33 Matrix Mixer - R8?

2013-12-06 by cg_synth

100k all round is the easiest.

Ken

>Hi Charlie,
>
>
> Yes, it might very well be RB. My eyes are straining. The counts did
suggest 100k, but I am guessing that since they are not labeled as such,
there might be other options. I will probably just go with the 100k value.
>
>
> Thanks for the quick reply!
> CJ
>
>
>
>
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><p>Hi Charlie,</p><p><br></p><p style="color:rgb(0, 0,
0);font-size:13px;font-family:arial, helvetica, clean,
sans-serif;background-color:transparent;font-style:normal;">Yes, it might
very well be RB. My eyes are straining. The counts did suggest 100k, but I
am guessing that since they are not labeled as such, there might be other
options. I will probably just go with the 100k value.</p><p
style="color:rgb(0, 0, 0);font-size:13px;font-family:arial, helvetica,
clean,
sans-serif;background-color:transparent;font-style:normal;"><br></p><p
style="color:rgb(0, 0, 0);font-size:13px;font-family:arial, helvetica,
clean, sans-serif;background-color:transparent;font-style:normal;">Thanks
for the quick reply!</p><p style="color:rgb(0, 0,
0);font-size:13px;font-family:arial, helvetica, clean,
sans-serif;background-color:transparent;font-style:normal;">CJ<br></p>
>
>
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>
></html>
>
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>

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