Hi Dieter, Thanks for the PCB layout. I needed 2M2 to get it clean! I guess it’s looking into a fairly high impedance. The results are great. My Simmonds SDSV patch now sounds perfectly 1981. Best wishes, John > On 9 Jan 2018, at 12:30, <yahoo@doepfer.de> <yahoo@doepfer.de> wrote: > > Hello, > > each of the four VCAs is equipped with a 47k input resistor (R1, R12, R23, > R34). If you increase the values of these resistors (or add a trimming > potentiometer to each resistor) the input signal is attenuated. You find the > position of the resistors in the attached picture. > > Best wishes > Dieter Doepfer > >> -----Ursprungliche Nachricht----- >> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com] >> Gesendet: Dienstag, 9. Januar 2018 12:50 >> An: yahoo@doepfer.de [Doepfer_a100] >> Betreff: [Doepfer_a100] A-132-4 Input Signal Level >> >> >> I find it is necessary to greatly attenuate a VCO output (say the >> sine wave from a A-111-1) to prevent distortion. I have adjusted >> the trimmers to get a full range sweep for an ADSR. >> >> Is there an input resistor that could be changed to remove the >> need for 2 x A-183-1 dual attenuators, or am I thinking about >> this incorrectly? >> >> Thanks >> John >> >> >> >> ------------------------------------ >> Posted by: John Hollis <john@hollis.je> >> ------------------------------------ >> >> >> ------------------------------------ >> >> Yahoo Groups Links >> >> >> > <A132_4_b.gif>
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Re: [Doepfer_a100] A-132-4 Input Signal Level
2018-01-09 by John Hollis