Doepfer

Hi list,

I have finally put a web page together detailing a modification to 
one of my A-110s in order to improve the waveshape of the sine output:

<http://mysite.wanadoo-
members.co.uk/tstinchcombe/synth/110_mod/110_mod.html>

(interested parties may remember I posted some preliminary findings 
about 6 or so weeks ago).

I did manage to get hold of the original paper (published in 1965) - 
I don't fully understand all of it yet (some of the algebra is pretty 
intractable!), but the circuit itself seems to work well enough, as 
hopefully demonstrated by the scope traces at the above link.

I will leave it up to Dieter to decide:
a) whether the circuit works well enough to *his* satisfaction,
b) whether there is likely to be enough interest to make the 
production of a small 'daughter board' viable or not, and
c) whether any such board might need space for an optional 'symmetry' 
trim-pot+resistor (my small 'sample size' of '1' might not be very 
representative!)

I shall do my best to answer any questions!

Tim

Tim Stinchcombe wrote:

> I have finally put a web page together detailing a modification to 
> one of my A-110s in order to improve the waveshape of the sine output:

Is there a mod to almost completely trim out that huge tri wave glitch, 
though? I wouldn't even bother adding the sine wave mod before I could 
fix that!