Synth-DIY Yahoo! Groups Archives

motm-850 assembly

2007-04-18 by David Moylan

I've finally gotten around to assembling my kit backlog and am working
on the MOTM-850.  When I got to the 2n3904 I noticed that the pins are
offset in the opposite direction than those on the board if I orient the
part according to the silkscreen.

Which is correct?  The silkscreen or the holes?

Thanks.

Dave

Re: [motm] motm-850 assembly

2007-04-18 by Mark

While, I do not have a specific answer to your question, that is a
common issue with common transistors.  Transistors, or their various
substitutions, available in the same package (eg. TO-92), can often
have different pin-outs, or be offset differently.  The best way is
to look up or test the transistor you have in order to determine
which pin is what, then figure out which traces go where based on the
schematic. Fortunately, the Synthesis Technology schematics are
excellent, and the boards are very well organized.

On 4/18/07, David Moylan put forth:

Show quoted textHide quoted text

>I've finally gotten around to assembling my kit backlog and am working
>on the MOTM-850.  When I got to the 2n3904 I noticed that the pins are
>offset in the opposite direction than those on the board if I orient the
>part according to the silkscreen.
>
>Which is correct?  The silkscreen or the holes?

RE: [motm] motm-850 assembly

2007-04-18 by John Loffink

The silkscreen orientation is correct.

John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com

Show quoted textHide quoted text

> -----Original Message-----
> From: motm@yahoogroups.com [mailto:motm@yahoogroups.com] On Behalf Of Mark
> Sent: Wednesday, April 18, 2007 4:30 PM
> To: motm@yahoogroups.com
> Subject: Re: [motm] motm-850 assembly
> 
> While, I do not have a specific answer to your question, that is a
> common issue with common transistors.  Transistors, or their various
> substitutions, available in the same package (eg. TO-92), can often
> have different pin-outs, or be offset differently.  The best way is
> to look up or test the transistor you have in order to determine
> which pin is what, then figure out which traces go where based on the
> schematic. Fortunately, the Synthesis Technology schematics are
> excellent, and the boards are very well organized.
> 
> On 4/18/07, David Moylan put forth:
> >I've finally gotten around to assembling my kit backlog and am working
> >on the MOTM-850.  When I got to the 2n3904 I noticed that the pins are
> >offset in the opposite direction than those on the board if I orient the
> >part according to the silkscreen.
> >
> >Which is correct?  The silkscreen or the holes?
>