[sdiy] Buchla Lowpass Gate Switch

[Peng]

Hi,
 
 I recently finished the Lopass Gate using Mark Verbos pcb. Works good. I put in a 2 position toggle to switch between lowpass/gate. I'd like to have a "both" position but can't figure out how to do it ( experiencing a brain freeze or something!). I have some SPDT center off and DPDT center off. 
  I had an idea to replace the -7.5V that goes to 1M resistor on pcb with +7.5V, then put  
-7.5V to middle lug of toggle. That way, if it's in the center (off) position, I'd get the both response ? Just a guess. 
  I searched this out in the archives first (of course) but didn't find anything, though there are references made. As a side note: On the search page of SDIY I typed in " Buchla Gate" - no results. Next tried "Buchla" - many results. One read "Buchla 292 Lowpass Gate" - this should have come up on first search. Next "Buchla Lowpass" - nothing. Lastly "Buchla 292" - got results. Seems you need to get the words in order, or just try to get the first word. Maybe I'm missing something ? If not, then it's a good thing to keep in mind when searching ( or posting for that matter ).
 
Thanks,
P.

		
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