Date: Wed, 6 Mar 1996 14:18:17 -0600 (CST)
To: Transistor Rhythm <psiborg@halcyon.com>
Cc: analog heaven <analogue@hyperreal.com>
From: Kent Williams <kent@inav.net>
Subject: Re: 606 indy outs

Psiborg wrote me and I took the time to obsess on the topic for a while,
so (without his permission) I'm CC'ing my reply to AH.

Petey said:
> pete here (psiborg on vrave).  i'm in the middle of attempting the indy 
> out mod on the 606.   the directions off hyperreal are pretty good, but 
> there are a couple of points i'm not too clear on.  
> 
> 1) are you supposed to remove the middle post on each pot complete or 
> just de-solder it from the board and use the bent post to connect the 
> lead to?
> 
If you have the tools, you can unsolder the middle terminal of each of
the pots (except accent).  Then you need the three terminal-type 1/8"
jack.  Solder a wire from the hole on the circuit board you've pried
the center terminal from, to the terminal on the 8th inch jack that
goes to the tip conductor.

Then, solder a wire from the other non-ground terminal on the 1/8" jack,
to the wiper (center) of the pot.  If you've done this right what you've
done is made it so that when you insert an 1/8" plug, the plug sleeve
gets ground, the plug tip gets signal, and the plug push the tip thingie
in so it breaks the connection between the 606 PCB and the wiper on the
pot.

If this isn't excruciatingly clear, then desolder the wiper, solder
a wire to it, solder a wire to the ground trace (the edge of the PCB), and
solder a wire into the hole you pulled the wiper from, and then experiment
with hooking it up to the 1/8" socket until you get it to cut the signal
into the mix, and get a signal output on the jack.


Or you can just solder a wire to the top of the middle lead on the pot,
and another to ground (the trace at the edge of the circuit board.

Best to use something like thin stranded wire, and leave some slack (2 inches)
so you can get everything put back together without wrecking anything.  When
you put the circuit boards back into the case, take the knobs off of the
pots, shove the wires in next to the pot shafts, and then gently put the box
back together before putting the knobs back on.

Make sure before you reassemble the 606 that the start stop button is in the
lid of the case -- it falls out when you take it apart, and you need to take
the fucker apart again if you want to put it back.

> 2)  the inner ring on the jack i'm guessing is the where one end of the 
> ground lead is connected, but then where does the other end go?  (did i 
> ask this question clearly?)
> 
See above.

> 3) suggestions?

Take your time.

> it doesn't seem that tough.  i just wish there was a simple diagram to 
> follow.  arrg.  thanks!
> 
> 

                     +----+
                     |    |
                     |   /+ Pt A
                     |  \
                     |  /
         To Pot +----+  |
                        |
         To PCB +-------+
                    -------------+--------------- Ring Ground 
                   ----------------

As you can kind of see, if you insert a plug into the jack, the tip of
the plug pushes the 'To PCB' thingie away from the 'To Pot' thingie.
---------------------------------------------------------------------
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who once inhabited the suburbs of human contempt find that without
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                                    -- Quentin Crisp
Kent Williams kent@inav.net
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(319) 626 6700 x 219 (work)
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