> Hello Mark
>
> On 21.05.12 22:21 , mark wrote:
> > so I'll see what it does when it's back in my system
> Just a word about that: The tuning and octave tracking is depending on
> the powersupply voltages. You may adjust a VCO in a foreign system to
> about 99% of its abilities, but the last 1% is only reachable, if you
> adjust it connected to the powersupply with which it will work in the
> future.
>
> So I suggest, that you bring at least that rack to EMIS, where the VCO
> is attached to.
>
> Florian

I don't think that this applies to the A-111-5 because it has additional
internal voltage regulators for the CEM3394 available. The internal supplies
for the CEM3394 are +8V and -5V. Even all tuning controls for the VCO
(octave switches, tuning control at the front panel, internal offset
frequency trimming potentiometer) are connected to the internal +8V
and/or -5V. But for other VCOs it's correct - provided that not the
A-100PSU2 is used. The A-100PSU2 is adjusted in the factory to +/-12,00V
within +/-10mV so that the supply voltage tolerances should not affect the
VCOs. But for simple supplies (e.g. with 7812/7912 regulators only or for
switching power supplies) the supply voltages may affect the VCO tuning.

Best wishes
Dieter Doepfer