hello tim,

--- In Doepfer_a100@yahoogroups.com , "Tim Stinchcombe" <timothy@t...>
wrote:

> Hi Ingo,
>
> > i thought about that module too, but it isn't available
> > anymore.
>
> The main chip in it is very hard to come by. I was curious as to

what

> the module was, so when he came across a limited number of chips at
> the end of last year, I snapped one up. Buying just the board was a
> cheap way to do it, but expensive in terms of time: ordering the
> parts, working out replacement parts to use for those not easily
> available in the UK, and working out how to put it all together.

definitely too complicated for me. i would never get it to work,
because i have absolutely no experience with circuitry and
i have very bad soldering skills ;-)

> the blacet-stuff seems to be cool, i have ordered
> > some modules last week, but i have to wait some weeks for
> > them. blacet seems to be very busy at the moment.
>
> I see he has 'Time Machines' available again - I'm tempted to go

for

> one of those, but they are pricey.

the time machine is one of the modules i ordered.
i was so excited that it is available again that i had
no clue :-)

> > many thanks, tim. i think i will do it the same way you did.
> > there are some more modules i want to modify with additional
> > switches, like a112, a176 and maybe a108.
> > the a108 seems to be a bit more complicated.
> > any experience
>
> I don't have either the 112 or 176, but I have an A-108 which I

have

> reverse engineered, and yes it is plenty complicated! Depending on
> what you want to do, I may be able to make some suggestions: if you
> want to be able to switch between the filter slopes, then something
> similar to the A-127 may work, but would require a different

conector

> (because of the way the jumpers are arranged); if you want to make
> all the filter slopes available, this will require additional
> circuitry. Which leads me to an idea:
>
> Dieter, if you see this, perhaps this would make a good candidate

for

> the new 'DIY page' - circuitry and PCB layout to extend the A-108

to

> output the remaining 4 filter sections. Should be pretty simple: 3x
> TL084, several handfuls of resistors, a power connector and some
> sockets, and means to hook into the A-108. I'm sure there are

several

> people out there who would like to do this!
>
> My happy thought for the day!

a176 and a112 have the same jumpers (2.54 mm), so it should
be the same procedure like with the a127.

the a108 mod sounds interesting. seems that i have to take
some soldering-lessons :-)

best wishes

ingo