Hello Silas!,

and thanks for your reply. Unfortunately I live in Stockholm, but I will see if I can find
someone here with an A-155 to try it out. I will also make a test to see if 9V is enough to
trigger the ARP gate. I think 0-7V of cv will be enough for most applications, but would
prefer to have this range on both rows if it would be possible to change the 4V mode of
the upper row to 7V, keeping the 1V and 2V modes for fine control of pitch. I suppose,
like you suggested, this could be done quite easily by changing a resistor or two. Anyone
who has tried this

Best regards,
Henrik

--- In Doepfer_a100@yahoogroups.com , "Silas Johansen" <sijodk@...> wrote:
>
> Hi Henrik,
>
> On 6/25/07, longforparade <longforparade@...> wrote:
>
> > -How "hot" are the trig/gate outputs on the A-155; does it put out the +10V
required to
> > trig the 2600's envelopes
>
> My A-155 outputs about 9V on the gate/trigger outs. I wouldn't be
> surprised if this turns out to be enough to trigger the ARP's
> envelope.
>
>
> > -I would also like to extend the cv range of the two sequencer rows to 0 - 10V to be
able
> > to, for example, open the 2600's filter or VCA from minimum to maximum. I suppose
this
> > could be done quite easily by amplifying the cv outs through an A-133 polarizer [ ],
but
> > has anyone tried an internal mod to the A-155 to extend the cv range
>
> The lower row on my A-155 outputs 0-7V when the scale knob is turned
> all the way up. I don't know if you'd gain much from modding it to
> output the extra 3V. I think the idea is that you would normally use
> the upper row for precision stuff like VCO's and the lower row for
> things that require greater range, like filters. Without bothering to
> unscrew my A-155 and try to figure out how I would assume that all you
> need to change those ranges is to replace a couple of resistors. But
> then, I wouldn't know if those ~7V is the output from the chip(s) that
> control which step is active...
>
> Also, if you don't mind me asking, your name could very well be Danish
> (or maybe Swedish), so if by any chance you happen to be in or near
> Copenhagen and would like to experiment with an A-155 before you buy I
> wouldn't mind seeing an ARP 2600 in action so we could probably figure
> out something. If I'm totally mistaken you can probably find somebody
> within reasonable distance from where you do live that would make the
> same kind of offer.
>
> /Silas
>