Cgs synth

Hi,

according to :

"Alternate layout

Having had the prototype in my synthesiser for some time now, a
second layout became obvious. Instead of having pots for both the B
channel and the multiplier outputs, I used a 4 pole 2 position switch
to select between the B channel and the multiplier outputs, saving me
a lot of panel space. The x2 output was sacrificed, and the rotary
switch to select the prescale was replaced by an SPDT switch for the
bypass function, and a SPDT center off switch was used to select
between divide by 3, 7 and 5. 7 is hard wired as the default on the
PCB, so no connection is needed to the switch. "

I've organized now a 4 pols 2 position switch, a SPDT on-on and a
SPDT on-off-on.
Can somebody please help me in terms of how to connect it to the
respective pads.

Am i right with my assumptions:

a) rightmost position of the pots to the 4x2 switch
b) from the 4x2 to the respective Pad on the PCB
c) mounting the center position to a pad before the 47K resistor "bank"


What i didn't get:

- Bypass/Prescale switch -> what to connect where
- Prescale DIV -> what to connect where.

Any help would be greatly appreciated.


--jan






[Non-text portions of this message have been removed]

>Hi,
>
>according to :
>
>"Alternate layout
>
>Having had the prototype in my synthesiser for some time now, a
>second layout became obvious. Instead of having pots for both the B
>channel and the multiplier outputs, I used a 4 pole 2 position switch
>to select between the B channel and the multiplier outputs, saving me
>a lot of panel space. The x2 output was sacrificed, and the rotary
>switch to select the prescale was replaced by an SPDT switch for the
>bypass function, and a SPDT center off switch was used to select
>between divide by 3, 7 and 5. 7 is hard wired as the default on the
>PCB, so no connection is needed to the switch. "
>
>I've organized now a 4 pols 2 position switch, a SPDT on-on and a
>SPDT on-off-on.
>Can somebody please help me in terms of how to connect it to the
>respective pads.
>
>Am i right with my assumptions:
>
>a) rightmost position of the pots to the 4x2 switch

The clockwise end of the pots go to the common terminals of the switch, yes.

>b) from the 4x2 to the respective Pad on the PCB

The terminals on one side of the switch goes to 1, 2, 3, 4 - the outputs on
the 4024 divider.
The terminals on the other side of the switch og to M1, M2, M3, M4

>c) mounting the center position to a pad before the 47K resistor "bank"

The wiper of the pots go the the mixer inputs, which is what I think you mean.

>What i didn't get:

>- Bypass/Prescale switch -> what to connect where

one outer termimal of bypass switch goes to "A"
center terminal of bypass switch goes to "B"
other outer terminal of bypass switch goes to center terminal of prescale
switch.

/3 goes to one outer terminal of prescale switch
/5 goes to the other outer terminal of prescale switch


Ken
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

--- In cgs_synth@yahoogroups.com, sasami@... wrote: