[sdiy] Solina String Ensemble calibration question

[Maarten Halmans]

The Rail voltage label says -15Volt, so I set it to -15Volt. But it does 
not seem very critical.

Cheers,
Maarten

Op 30-5-2022 om 19:11 schreef Rutger Vlek via Synth-diy:
> Dear list,
>
> As you may have inferred from my previous post a couple of months ago, 
> I'm restoring an old Eko Stradivarius. I have the schematic for it, 
> but no service manual with calibration instructions. From the 
> schematic, I could establish that the Eko is nearly identical to early 
> Solina String Ensembles and was hoping to find someone here 
> experienced in calibrating them.
>
> My specific question is about the 2K2 trimmer labeled 422 (part of the 
> "rail voltage and crescendo circuit") in this schematic of the solina: 
> https://manuals.fdiskc.com/flat/ARP%20Solina%20Schematics.pdf
>
> What does it do and how should it be calibrated?
>
> Rutger
>
> ps. Besides the absence of the trigger input/output, the most 
> interesting difference between the Eko and the Solina is the ability 
> to continuously adjust the level of each voicing on the Eko (versus 
> on/off switches on the Solina). Depending on levels, interesting phase 
> effects happen between the string and brass registers (and also with 
> crescendo's), that originate from the phase response of the formant 
> filters in the brass section (I think).
>
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