Doepfer

It would be great to see a revised A-126, now that the quadrature VCO is out and about.

Does someone have the latest info when Dieter is tackling a frequency shifter ?

It's such a great module!!!

best,

Julian

> It would be great to see a revised A-126, now that the quadrature VCO is out and about.
> Does someone have the latest info when Dieter is tackling a frequency shifter ?
> It's such a great module!!!
>
>
> best,
> Julian

We already began with the schematics. The old pcb layout system was based on an Atari and could not be used any longer. So far the
dome filter is ready. The rest of the circuit (multipliers, envelope follower, VCA and so on) will follow within the next few weeks
and then we can start to design the pc board. One problem is that the multipliers used in the A-126 (MC1496) are no longer available
and we have to replace them by other circuits (of find sufficien NOS MC1496). Maybe we can make it until end of the year. But I do
not want to promise anything.

Best wishes
Dieter Doepfer

> nevermind, i found the reply from Dieter. I hope there are affordable multipiers out there....
> Doesn't the A-137-1 need multipliers as well ?

No the A-137-1 only requires OTAs (or VCAs). These are also so-called "two-quadrant multipliers": one bipolar input (the audio
input) and one input positive only (the CV input). The multipliers for ringmodulators (which are used in the frequency shifter also)
are so-called "four-quadrant multipliers" with two bipolar inputs.

Best wishes
Dieter Doepfer

What update? Have I missed something?

Sent from my iPhone

> On 24 Jul 2015, at 13:44, julianboyd@web.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> fantastisch ! Thank you for the detailed update. So an appearance at Musikmesse next year seems to be a possibility. 
> 
> After i read that the band Chromeo uses an old PC running Windows 95 for sequencing their recordings even today, i am not surprised that you were hanging on to Atari for a long time :)
> 
> thanks again,
> Julian
> 
>