system100m diy?

Paul Maddox Paul.Maddox at
Mon Nov 15 10:31:22 CET 1999


  Your biggest problem will come with the VCO's, they use
the UA726 heated transistor pair, which are no longer made
and where you see them for sale they cost a fortune..


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-----Original Message-----
From:	Doctor Schinkelfunk [SMTP:bbclap at]
Sent:	Friday, November 12, 1999 1:22 PM
To:	synth-diy at
Subject:	system100m diy?

I am new to the list, and new to synth-building. Fed up with my not so 
analogue sounding syths as the jx8p and the obmx, I decided I wanted to 
build my own.
I started with building the filter and tb3030 from Tony Allgood. Very nice, 
that's more like it!
Now I got hold of the service manual for the Roland system100m, and I was 
thinking of building it. 

Does anyone have any suggestions about it, or tips, or maybe alternatives? 
One problem are some parts. For instance the BA662 A and B are used a lot. 
Tony subsribes a BA6110 from Rohm. Is it a good replacement for the 662, 
also in the filter?

Thanks a lot,


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