Doepfer

Hi Richard,

> Does anybody the difference in circuit design that would cause this 
> effect? Can I easily modify my newer A-155 to behave the same way?

Newer 155's have a small mod on them, which I believe is to stop it 
stepping more than one step when manually clocking it (and it's also 
the thing that stops you clocking it very fast!). Underneath 'Board 4 
(Controller Board)' (one of the small ones), on your newer 155 you 
should see a capacitor and resistor soldered together and bridging a 
couple of pins on an IC. I suspect this mod may be what stops newer 
ones behaving this way. I know Bakis (for one) has removed this mod 
on his 155's, so perhaps if he is listening he can quickly try 
clocking it with a sawtooth to see if it does clock 'randomly'? 
(It'll save me getting my soldering iron out, but I will carry on 
looking at it to see if I can figure the exact mechanism out...)

Tim