Hi Ross,

I have to correct my advice: Timothy Stichcombe explained correctly,
that the summing point at pin2 of IC1 is not useful. You must use the
output of the summing op amp. The voltage will read inverted here
(increasing the tune pot, will lower the measured voltage), but you
don't have to care for, because you have to set it to zero anyway.

Florian

Ross Goniakowski wrote:

> Florian:
>
> the other day you provided me with detailed instructions for A110 calibration...the one part i'm unsure of is this:
>
> "Set VCO-Offset (trim pot P6) that way that Pin 2 of summing Opamp 1
> reads really exactly 0 Volts (setting the rotary octave switch may be
> required)"
>
> i see Pin 2 of summing op amp 1, but i'm not sure where to find it on the board...i think its accesible at R5 next to P6, is that correct
>
>
>
> thank you for your time,
> rg
>
> [Non-text portions of this message have been removed]
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

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Florian Anwander |ConSol
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