Doepfer A-135-1 Voltage Controlled Mixer Re-Design

Old version of the A-135

The original A-135 module was a simple quad voltage controlled mixer.
It was made of 4 independent linear VCA's, mixed to one common output.
For each VCA the following inputs and controls were available: audio input with attenuator, control voltage input with attenuator, gain (pre-amplification).
The VCA's were realized with high-quality CEM VCA's (CEM3381).

The module could be used for voltage controlled mixing of up to 4 audio signals with separate control voltages (e.g. by LFO's, ADSR's, Random, Shepard generator, MIDI-to-CV interface or other control voltage sources).

In June last year, Doepfer announced the re-design of several modules because of shortage of CEM3080 Chips that were used in this A-135 and other modules.
This year a few of these re-designed modules were released, each in a slightly extended/ improved version (like the A-130/131 that are now also DC-coupled, and the recently announced A-141-2).*

A-135-1 Redesign of the A-135

This new version of the A-135 also has some nice extras in the form of a Sum Out and 4 single outputs for each channel instead of only one (Mixed) Audio output on the original A-135.
They've also managed to make it only 18 HP instead of  22 HP wide.

The new version of the A-135-1 is also able to process slowly varying control voltages because the signal in/outputs are DC coupled.

The new version is manufactured from May 2013 and is available now.

* More re-designs were also promised to us last year, like the A-107, A-116, A-127, A-132-1, A-147, A-171), so that promises a lot for the future...

Find more about various Doepfer re-designs via http://patchpierre.blogspot.nl/search/label/Re-design

Doepfer Pre-MusikMesse 2013 Announcements

Dieter Doepfer made a few announcements today about the upcoming new modules and about the MusikMesse 2013, that will be held from the 10th to the 13th of April 2013 in Frankfurt, Germany.

I'm looking most forward to the new A-157 Mini Schaltwerk prototypes, i cant wait until the are finished.:
Doepfer stated that they " ...will hopefully show the "large" version of the trigger sequencer A-157/miniature Schaltwerk (8 rows with 16 steps each).
The 8x16 button/LED board is ready but I cannot guarantee that the controller board will be also ready for the Musikmesse."

One of the earlier
A-190-5 prototypes

They will also show the prototype of the new version of the A-190-5 Polyphonic USB/Midi-to-CV/Gate Interface (with LCD) and the A-190-8 USB/Midi-to-Sync Interface at the Musikmesse in Frankfurt.

These modules will be available about summer 2013. 

The other news:

The small version of the multiple A-180 is available in April 2013 (2 HP only, name: A-180-2)

The module A-171-2 (licensed copy of the Serge/CGS VCS) will be available about end of April or early in May 2013.
(It will be interesting to see how the Serge's new deal with TipTop works out - expect a surge of Serge for your Eurorack this year /PP)

A-171-2 Serge
Slew Limiter
prototype

The re-designed A-130 (linear VCA) is now delivered with a precision VCA circuit (SSM2164) instead of the CA3080).
The new A-130 is DC-coupled.

The re-designed A-131 (exponential VCA) is now delivered also with an improved VCA circuit (high end THAT VCA circuit instead of the CA3080).
The new A-131 is also DC-coupled.

The A-135 will be available from about May 2013 in a revised version with DC coupling of the signals and single outputs, i.e. it can be used also as 4 separate linear VCAs with manual gain, CV in with attenuator and signal in with attenuator.
Because of the DC coupling it can be used also for modulation signal processing (i.e. voltage controlled mixing of control signals).

So, a lot of updates, can't wait to see the first pictures of the A-157 combo coming from MusikMesse.
Are you going to MusikMesse this year and want to contribute pictures to PatchPierre.Net?
Feel free to contact me via the comments, email or Twitter, thanks in advance!