hello dieter,


--- In Doepfer_a100@yahoogroups.com , "Dieter Doepfer" <hardware@d...>
wrote:

> Right. But we still have some CEM3381 in stock so the next

production series

> of A-134 and A-135 is "safe". After this even these modules will

have to be

> redesigned (may be with THAT VCAs or the Analog Devices SSM2164

Quad VCA).


yes, this would be cool. afaik these vca's can also process
dc voltages, so such a redesign would be a real improvement.

> Even for the A-126 we still have some CEM3382 in stock but we also

plan a

> separate voltage controlled quadrature oscillator module that will

allow

> lower frequencies down to a few Hz. Fortunately there are jumpers

on the

> A-126 module (required for adjustment) where the external QVCO can

be

> connected without soldering by replacing the jumpers with 2 pin

female

> headers. Unfortunately we used the CA3080 for the prototype of the

QVCO

> which is obsolete now and so we have to start again. May be with

LM13700

> hoping that this circuit will be continued in the near future.

Really a hard

> job at the moment ...

so the new quadrature vco will not be a thru-zero design

best wishes

ingo