MOTM

hello all,
got a bit of a doepfer problem - and i hope the context keeps it on
topic
i've been building a rather nice MOTM based system for a good few
years now and i've added Oakley / CGS / Blacet modules in home made
MOTM form factor panels (when the wonderful Stooge alternative wasn't
available...

...now then - i just got a Doepfer A112 Sampler / Wavetable thingy
second hand, and as modular purchases have tailed off a little
recently (new priority is house deposit)

i have several option, and i'm wanting the venerable lists' advice /
experience

1) - just get on with it and buy a cheap Eurorack ?

2) - mount it in a dummy panel with a small voltage convertor

3) - go for it - completely MOTMise it

4) - mount it in a little stand alone case

i have a handful of +/-12V supplies around so i'm looking for options

thanks for your time

cheers
paul
sheffield

Paul Bower writes:

> ...now then - i just got a Doepfer A112 Sampler / Wavetable thingy
> second hand, and as modular purchases have tailed off a little
> recently (new priority is house deposit)

Best wishes on your house!

> 3) - go for it - completely MOTMise it

Well, I'm a big MOTM fan (6'5", 240...) ;) so I'd say go for the MOTM
factor! Personally, I really like having the same knobs, cables, etc
for all my modules. If you can wait until January/February, I bet I
could even put together a stooge panel for it...

Doug

http://www.stoogepanels.com

This is a good opportunity for you to maybe start a small Eurorack
system? Why not just buy one Doepfer frame and slowly expand whenever you
see a module that catches your fancy? That¹s exactly what I did.
I've been a MOTM user just about as long as you. I also have Blacet/CGS,
and other stuff in MOTM format. This year I decided I wanted to branch off a
little into eurorack land. There's too many good modules over there to be
ignored anymore.

Regards,
John

On 11/21/06 9:03 AM, "Paul Bower" <vulture.squadron@...> wrote:

> hello all,
> got a bit of a doepfer problem - and i hope the context keeps it on
> topic
> i've been building a rather nice MOTM based system for a good few
> years now and i've added Oakley / CGS / Blacet modules in home made
> MOTM form factor panels (when the wonderful Stooge alternative wasn't
> available...
>
> ...now then - i just got a Doepfer A112 Sampler / Wavetable thingy
> second hand, and as modular purchases have tailed off a little
> recently (new priority is house deposit)
>
> i have several option, and i'm wanting the venerable lists' advice /
> experience
>
> 1) - just get on with it and buy a cheap Eurorack ?
>
> 2) - mount it in a dummy panel with a small voltage convertor
>
> 3) - go for it - completely MOTMise it
>
> 4) - mount it in a little stand alone case
>
> i have a handful of +/-12V supplies around so i'm looking for options
>
> thanks for your time
>
> cheers
> paul
> sheffield
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

I can't imagine there's anything in this module that would be too
demanding of exact power supply voltage, Paul. Set it up with a
-12/+12 supply to watch proper behavior, then give it -15/+15 and see
what happens. It surely won't blow up. Most designs will work with
either voltage with little if any modification.

With Stooge Panels on the horizon, going the full MOTM route seems a
good choice!

Chub

--- In motm@yahoogroups.com, Paul Bower <vulture.squadron@...> wrote:
>
> hello all,
> got a bit of a doepfer problem - and i hope the context keeps it on
> topic
> i've been building a rather nice MOTM based system for a good few
> years now and i've added Oakley / CGS / Blacet modules in home made
> MOTM form factor panels (when the wonderful Stooge alternative wasn't
> available...
>
> ...now then - i just got a Doepfer A112 Sampler / Wavetable thingy
> second hand, and as modular purchases have tailed off a little
> recently (new priority is house deposit)
>
> i have several option, and i'm wanting the venerable lists' advice /
> experience
>
> 1) - just get on with it and buy a cheap Eurorack ?
>
> 2) - mount it in a dummy panel with a small voltage convertor
>
> 3) - go for it - completely MOTMise it
>
> 4) - mount it in a little stand alone case
>
> i have a handful of +/-12V supplies around so i'm looking for options
>
> thanks for your time
>
> cheers
> paul
> sheffield
>

Id advise against this.

The a112, being a digital module, probably works on +5v. Id imagine its
regulated down from +12v anyway, and the extra voltage at +15v may be enough
to overstreatch the regulator / heat dissipation, etc. Failure may not even
be that quick.

Julian (who has an a112 in his rack, but cant look at the pcb without a
screwdriver...)

>>>>>>>>>>>>>>

I can't imagine there's anything in this module that would be too
demanding of exact power supply voltage, Paul. Set it up with a
-12/+12 supply to watch proper behavior, then give it -15/+15 and see
what happens. It surely won't blow up. Most designs will work with
either voltage with little if any modification.

many thanks for the replies chaps

[I tried replying to this privately but the message bounced]

Doepfer talks about running their modules on +/-15 in the FAQ on their
website. The short version of the story is that it will probably work.

--Adam

> -----Original Message-----
> From: Paul Bower [mailto:vulture.squadron@...]
> Sent: Tuesday, November 21, 2006 7:04 AM
> To: MOTM litserv
> Subject: [motm] Got a doepfer question (but it is on topic?)
>
> hello all,
> got a bit of a doepfer problem - and i hope the context keeps
> it on topic i've been building a rather nice MOTM based
> system for a good few years now and i've added Oakley / CGS /
> Blacet modules in home made MOTM form factor panels (when the
> wonderful Stooge alternative wasn't available...
>
> ...now then - i just got a Doepfer A112 Sampler / Wavetable
> thingy second hand, and as modular purchases have tailed off
> a little recently (new priority is house deposit)
>
> i have several option, and i'm wanting the venerable lists'
> advice / experience
>
> 1) - just get on with it and buy a cheap Eurorack ?
>
> 2) - mount it in a dummy panel with a small voltage convertor
>
> 3) - go for it - completely MOTMise it
>
> 4) - mount it in a little stand alone case
>
> i have a handful of +/-12V supplies around so i'm looking for options
>
> thanks for your time
>
> cheers
> paul
> sheffield
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>

Take a look at the regulators used and check their input voltage
range. Honestly, I don't know of any three-pin regulators that have
12 volts as a maximum, even the lowly 7805 in the TO-92 case (likely
what's on the A112) has a 35 volt max with built-in thermal and short
circuit protection. This device has a 100mA design rating. If it's
warm at 12 volts, it won't be much warmer at 15.

I've built and modded plenty of digital gear. Voltage changes of this
low magnitude seldom require any modification.

Chub

--- In motm@yahoogroups.com, "Julian" <julian@...> wrote:
>
> Id advise against this.
>
> The a112, being a digital module, probably works on +5v. Id imagine its
> regulated down from +12v anyway, and the extra voltage at +15v may
be enough
> to overstreatch the regulator / heat dissipation, etc. Failure may
not even
> be that quick.
>
> Julian (who has an a112 in his rack, but cant look at the pcb without a
> screwdriver...)
>
>
>
> >>>>>>>>>>>>>>
>
> I can't imagine there's anything in this module that would be too
> demanding of exact power supply voltage, Paul. Set it up with a
> -12/+12 supply to watch proper behavior, then give it -15/+15 and see
> what happens. It surely won't blow up. Most designs will work with
> either voltage with little if any modification.
>