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@... > < yahoo@... > 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@... 1
>> Betreff: 1 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@... >
>> ------------------------------------
>>
>>
>> ------------------------------------
>>
>> Yahoo Groups Links
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>>
>>
> <A132_4_b.gif>