AW: [Doepfer_a100] Alternatives to A-155 for trigger/gate sequencing

From yahoo
Sent Thu, Feb 27th 2014, 15:14

> Thanks for that suggestion David. I've never paid much attention
> to the ASol modules and this one's a beauty! But... I am planning
> a small 100% Doepfer synth and would like to come up with a
> sequencing solution that is fully modular (combining the
> following A- modules: 147 148 150 151 152 156 160 161 etc), . I
> thought about using the A-182-1 switched multiple but I think
> that it would short out the A-161's outputs. An 8HP A-186-1 with
> a switch at each input and 9 sockets instead of 8 would be a
> perfect partner for an A-161! Dieter...?

It would be much easier to modify the A-182 by adding a diode between each
socket and switch. Simply interrupt the pcb track between socket and switch,
solder a diode between socket and switch (the schematics is shown on the
A-186 page) and add an output socket. That way you obtain a "switched" A-186
gate/trigger combiner.

It would probably take only a few hours to "condense" the A-182 pcb and
front panel to obtain such a module (with 9 sockets and 8 switches). But I'm
not sure if there are sufficient inquiries for such a module. An additional
option would be select between "DC coupled combination" (i.e. gate remains a
steady gate signal at the sum) or "AC coupled combination" (i.e. only the
rising edges of the inputs signals are used to generate the combined trigger
signal). The two types could be distinguished by left/right positions of the
switches (center = off).

Best wishes
Dieter Doepfer



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