Cgs synth

>Does this mean that all 3 1uF electrolytics that are first encountered
>after the LP, HP and BP inputs should be put in 'backwards' on the
>pcb, that is, the negative of the electrolytic placed at the + on the
>pcb?

Correct. (except for the HP input, where a link is installed instead)

>> Nyle also suggests leaving out the 1uF electro (use a link instead)
>> and pulldown resistor (leave empty) on the High Pass input.

>So remove the first 1uF after the HP input. Do I remove the 390K or
>remove the 1K (next to the 2n2 capacitor)? Does this change the
>timbre characteristics of the HP?

Remove the 390k resistor. It should not change the characteristics.

>> If you look at the circuit, there is a 1k
>> "pulldown" and a 2n2 "decoupler" present as parts of the filter
>core. No
>> harm will come if these parts are left in.

>Is this a separate issue to removing the 1uF electrolytic in the HP
>input mentioned immediately above? Does retaining the 2n2 and
>associated 1K change the timbre characteristics of the HP?

The 2n2 and 1k are part of the filter. The should be left as is. The parts I
was refering to as not being critical if removed or left are the 1uf and the
390k, so with respect to the HP input you have the two options here:

1) reverse the 1uF into the HP input, and change nothing else.
or
2) remove the 390k and 1uF from the HP input, and put a link in place of the
1uF.


Cheers,

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