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Passive mixer for balanced signals?

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Anonymous   04-14-2004 at 02:21:44 PM

Archived from groups: rec.audio.tech (More info?)

 

In order to avoid buying a new mixer, which I really can not afford, I am
considering passively combining 2 balanced signals (specificallay the
output of Yamaha TF1 modules). I know for un-balanced signals you use
resistors to isolate the two sources. Is a similar approach possible for
balanced signals? If so what issues might arise? I would really only be
doing this while writing and not for any serious recording.

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Anonymous   04-14-2004 at 04:42:52 PM
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Archived from groups: rec.audio.tech (More info?)

 

On Wed, 14 Apr 2004 08:21:44 GMT, Steven Jones <_jones57_@swbell.net>
wrote:

>In order to avoid buying a new mixer, which I really can not afford, I am
>considering passively combining 2 balanced signals (specificallay the
>output of Yamaha TF1 modules). I know for un-balanced signals you use
>resistors to isolate the two sources. Is a similar approach possible for
>balanced signals? If so what issues might arise? I would really only be
>doing this while writing and not for any serious recording.

So unbalance them?

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Anonymous   04-14-2004 at 02:21:45 PM
- 0 +

Archived from groups: rec.audio.tech (More info?)

 

"Steven Jones" wrote ...
> In order to avoid buying a new mixer, which I really
> can not afford, I am considering passively combining
> 2 balanced signals (specificallay the output of Yamaha
> TF1 modules). I know for un-balanced signals you use
> resistors to isolate the two sources. Is a similar approach
> possible for balanced signals?

Yes. Or you could just "convert" to unbalanced.

> If so what issues might arise?

Keep everything symmetrical (for balanced).
Or possibly just convert to unbalanced and mix if it
is a non-critical application.

> I would really only be doing this while writing
> and not for any serious recording.

Go for it. No fundamental downside.

Reply to Anonymous
Anonymous   04-14-2004 at 04:42:53 PM
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Archived from groups: rec.audio.tech (More info?)

 

Yes. Combine the hots with a 10K in series with each, and same for
the colds. The closer the R's are matched the better, but for a
casual use it is fine. I wire these assemblies (R's matched to .1%)
into three patchpoints on a console bay and they get used all the
time, for both tracking and mixing.
Cheers

Reply to Anonymous
Anonymous   04-21-2004 at 02:39:14 PM
- 0 +

Archived from groups: rec.audio.tech (More info?)

 

Check my handy little design chart here:
http://electronicdave.myhosting.ne [...] etwork.gif
--Dave


Steven Jones <_jones57_@swbell.net> wrote in message news:<rw6fc.9085$Jn6.4787@newssvr23.news.prodigy.com>...
> In order to avoid buying a new mixer, which I really can not afford, I am
> considering passively combining 2 balanced signals (specificallay the
> output of Yamaha TF1 modules). I know for un-balanced signals you use
> resistors to isolate the two sources. Is a similar approach possible for
> balanced signals? If so what issues might arise? I would really only be
> doing this while writing and not for any serious recording.

Reply to Anonymous
Anonymous   04-22-2004 at 10:18:42 AM
- 0 +

Archived from groups: rec.audio.tech (More info?)

 

On Wed, 14 Apr 2004 05:24:36 +0000, Richard Crowley wrote:

> "Steven Jones" wrote ...
>> In order to avoid buying a new mixer, which I really can not afford, I
>> am considering passively combining 2 balanced signals (specificallay the
>> output of Yamaha TF1 modules). I know for un-balanced signals you use
>> resistors to isolate the two sources. Is a similar approach possible for
>> balanced signals?
>
> Yes. Or you could just "convert" to unbalanced.
>
>> If so what issues might arise?
>
> Keep everything symmetrical (for balanced). Or possibly just convert to
> unbalanced and mix if it is a non-critical application.
>
>> I would really only be doing this while writing and not for any serious
>> recording.
>
> Go for it. No fundamental downside.


have a look at:
www.rane.com/note109.html

it shows you how to make a simple little box that will work with both
balanced and unbalanced signals.

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