Doepfer

Hi Jamie,

> I'm looking at the following modules:
> 
> A-110 VCO(x2)
> A-124 WASP FILTER
> A-146 LFO2
> A-100MNT Mini Power Supply
> 
> Now, this is to make an extremely compact little synth for pure 
tonal
> drone sounds. No percussion and no external control (MIDI or CV). I
> have an Arrick modular at home and predominantly use two 
oscillators,
> and a couple of filters for subtle textural drone stuff. I just 
need a
> dramatically smaller solution than the Arrick for travel. I'd like
> this all to fit into a space approx 8"W x 6"H x 2.5-3"D. If you have
> an suggestions about the modules let me know.

Thats a bit of a tall order on several fronts! First the power: by 
Doepfer figures, these 4 modules need 210mA; on EMIS figures this 
comes down to 180mA - either way its obviously too much for a single 
MNT supply (at 100mA max). Second, your depth requirement of 2.5 - 3 
inches. I don't have a 124, but from what I know of the circuit its 
not massively complicated, and so is only likely to be about 2.5 
inches deep as the other modules you list are. I've got no idea of 
how much space the power supply+ bus board will need, but you 
probably ought to reckon on at least 2 inches (a guess), if not more 
(it's conceivable it wouldn't necessarily need mounting on the back 
plate, but where and how you put it obviously depends on the exact 
physical dimensions). That probably means about 6 inches minimum. The 
total width is 36HP, which is about 7 1/4 inches or so (1HP is just a 
little over 5mm). In fact Analogue Solutions make a 36HP case, which 
might do it:

http://www.users.globalnet.co.uk/~concuss/concussor/minimodular.htm

and I think the height of their modules is the same (but check!), and 
its obviously much deeper than your figure - they quote 16.5cm = 6.5 
inches. And if you are lucky, the bus connectors might be the same - 
I think one of Analogue Solutions/Analogue Systems stuff is, maybe 
both (?). I didn't read enough to see whether the power supply would 
be able to deliver what the Doepfer modules would need.

Well, plenty to think about - there's nothing like having a little 
project on the go...

Tim