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 Forum index » DIY Hardware and Software » fonik's place
5-channel Attenuverting Mixer 2nd run
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fonik



Joined: Jun 07, 2006
Posts: 3755
Location: Germany
Audio files: 23

PostPosted: Mon Aug 25, 2008 8:09 am    Post subject: Reply with quote  Mark this post and the followings unread

a.b.o.z. wrote:
fonik wrote:
sent out the first batch today. i don't have the time to PM everyone today. nevertheless everyone whos PCBs have been sent will receive a PM this weekend...

didn't get that PM. hmmm
I've sent payment. Did you get it?
Or you didn't had time to send PMs.

my fault. you are right, i did not have the time, yet, which is not what i wanted...

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cheers,
matthias
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Peake



Joined: Jun 29, 2007
Posts: 1106
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PostPosted: Mon Aug 25, 2008 9:57 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank you very much!! Your time and effort are appreciated!
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"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog
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a.b.o.z.



Joined: Feb 07, 2007
Posts: 350
Location: Zagreb, Croatia
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PostPosted: Mon Aug 25, 2008 11:21 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
a.b.o.z. wrote:
fonik wrote:
sent out the first batch today. i don't have the time to PM everyone today. nevertheless everyone whos PCBs have been sent will receive a PM this weekend...

didn't get that PM. hmmm
I've sent payment. Did you get it?
Or you didn't had time to send PMs.

my fault. you are right, i did not have the time, yet, which is not what i wanted...

hei no problemo at all.
thxn
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Danno Gee Ray



Joined: Sep 25, 2005
Posts: 1342
Location: Telford, PA USA

PostPosted: Tue Aug 26, 2008 9:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Received my two boards today. They look great!

Thanks Mathias.
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numbertalk



Joined: May 05, 2008
Posts: 980
Location: Austin, TX
Audio files: 5

PostPosted: Tue Aug 26, 2008 2:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Got mine too - thanks!!!
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a_guy_called_tom



Joined: Jun 21, 2008
Posts: 31
Location: mountains

PostPosted: Wed Aug 27, 2008 9:10 am    Post subject: Reply with quote  Mark this post and the followings unread

mine arrived too, they look great. Thanks alot!
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a.b.o.z.



Joined: Feb 07, 2007
Posts: 350
Location: Zagreb, Croatia
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PostPosted: Thu Aug 28, 2008 10:00 am    Post subject: Reply with quote  Mark this post and the followings unread

got mine today.
great!!
thnx M.
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ericcoleridge



Joined: Jan 16, 2007
Posts: 885
Location: NYC

PostPosted: Thu Aug 28, 2008 2:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

I also got mine today. Beautiful job. Very Happy
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Peake



Joined: Jun 29, 2007
Posts: 1106
Location: Loss Angeles
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PostPosted: Thu Aug 28, 2008 5:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Received! Thank you very much! Very Happy

Edit: I don't see any 1% resistors indicated in the documetation. I'll thus take it that there are none required or recommended? That the trimpots negate the need? Thanks!

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rjd2



Joined: Sep 02, 2007
Posts: 235
Location: philly

PostPosted: Fri Aug 29, 2008 12:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

so ive got a question here, sorry to be daft about this, but need to confirm something...

do the individual input pots work like this: hard R=full gain, hard L=full gain inverted, 12 oclock=0 gain?

it just popped into my head that if i am reading this right, this would be a hugely utilitarian module for me down the line. if so, are there any spare boards available? thanks.
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fonik



Joined: Jun 07, 2006
Posts: 3755
Location: Germany
Audio files: 23

PostPosted: Fri Aug 29, 2008 12:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Peake wrote:
Received! Thank you very much! Very Happy

Edit: I don't see any 1% resistors indicated in the documetation. I'll thus take it that there are none required or recommended? That the trimpots negate the need? Thanks!

you are absolutely right. BTW i am always using 1% resistors since they are not much more expensive at the store i buy them...

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matthias
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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Aug 29, 2008 12:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

rjd2 wrote:
so ive got a question here, sorry to be daft about this, but need to confirm something...

do the individual input pots work like this: hard R=full gain, hard L=full gain inverted, 12 oclock=0 gain?

correct. the trimmers are needed to calibrate the 0V at 12 o'clock (potentiometers usualy have tolerances about 10-20%)

Quote:
it just popped into my head that if i am reading this right, this would be a hugely utilitarian module for me down the line. if so, are there any spare boards available? thanks.


there are still PCBs left.
just tell me how many you need.

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cheers,
matthias
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rjd2



Joined: Sep 02, 2007
Posts: 235
Location: philly

PostPosted: Fri Aug 29, 2008 7:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

question on caps-any of the values should be film or polystyrene or anything? im planning on using these as VCO summers, among other uses.
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crashlander42



Joined: Oct 21, 2006
Posts: 292
Location: Orlando, FL (US)

PostPosted: Sat Aug 30, 2008 2:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Got my boards today! They look great!
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fonik



Joined: Jun 07, 2006
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Location: Germany
Audio files: 23

PostPosted: Sat Aug 30, 2008 3:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

rjd2 wrote:
question on caps-any of the values should be film or polystyrene or anything? im planning on using these as VCO summers, among other uses.

there are no capacitors in the audiopath. using poly for decoupling is a good choice, i think.

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cheers,
matthias
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Fungitec



Joined: Nov 16, 2006
Posts: 4
Location: Sweden

PostPosted: Mon Sep 08, 2008 1:45 pm    Post subject: Still boards available...? Reply with quote  Mark this post and the followings unread

Is there by any chance boards left here Fonik? If thats the case, I would like a pair of them. Please sign me up for two if you still got any spares... plz. Smile Thanx

/thure
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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Sep 08, 2008 10:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

still some boards left. check PM.
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matthias
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loopcycle



Joined: Nov 06, 2006
Posts: 98
Location: California

PostPosted: Wed Sep 17, 2008 7:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

received my boards. beautiful work! thanks for this.
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Peake



Joined: Jun 29, 2007
Posts: 1106
Location: Loss Angeles
Audio files: 3

PostPosted: Tue Sep 23, 2008 2:39 am    Post subject: Reply with quote  Mark this post and the followings unread

I've got a board up and running- great stuff! My first intent is to use it to substitute for a power supply for the Moog Modules, until I get one built: 12V, -6V, and -10V rails are required (the classic power supply does not regulate the -10V). For some reason, I was only getting 1V at the internal/jack normal'd source, so I jumpered R29 to pass the full 15V to the pots. Presto, just set the pots to the desired voltages. I don't know if this will work in powering the modules yet, but it's fun to play with Smile

Thanks a bunch for the second run!!

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loss1234



Joined: Jul 24, 2007
Posts: 1535
Location: nyc
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PostPosted: Tue Sep 23, 2008 7:47 am    Post subject: Reply with quote  Mark this post and the followings unread

does anyone think i could get away with using SINGLE TURN 50k trimmers?
i really want to get this built (mainly as an audio mixer) and i have tons of single turn trimmers but NO 50k multi turn.

thanks

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-------------------------------------------- check out various dan music at: http://www.myspace.com/lossnyc
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fonik



Joined: Jun 07, 2006
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PostPosted: Tue Sep 23, 2008 8:26 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:
does anyone think i could get away with using SINGLE TURN 50k trimmers?
i really want to get this built (mainly as an audio mixer) and i have tons of single turn trimmers but NO 50k multi turn.

thanks

actually you could get away without a trimmer and a fixed resistor instead. the trimmer is just to calibrate the processing potentiometer to OV at 12 o'clock.

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cheers,
matthias
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fonik



Joined: Jun 07, 2006
Posts: 3755
Location: Germany
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PostPosted: Tue Sep 23, 2008 8:31 am    Post subject: Reply with quote  Mark this post and the followings unread

try a single turn trimmer. you could get set it with patience and a tranquil approach...
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matthias
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LektroiD



Joined: Aug 23, 2008
Posts: 977
Location: Scottish Borders
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PostPosted: Tue Sep 23, 2008 9:53 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
still some boards left. check PM.


can I take one please? Wink
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fonik



Joined: Jun 07, 2006
Posts: 3755
Location: Germany
Audio files: 23

PostPosted: Tue Sep 23, 2008 1:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

Brainstormer wrote:
can I take one please? Wink


sure, check PMs.

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matthias
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LektroiD



Joined: Aug 23, 2008
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PostPosted: Wed Oct 01, 2008 12:39 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
rjd2 wrote:
question on caps-any of the values should be film or polystyrene or anything? im planning on using these as VCO summers, among other uses.

there are no capacitors in the audiopath. using poly for decoupling is a good choice, i think.


Oops... should I remove and change these?


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