[sdiy] input coupling capacitor, sh101

[Oakley Sound]

> it seems that replacing the input coupling capacitor on any synth or 
> amplifier results in a better bass response. Can someone point out 
> which cap should be swapped on an sh101?

This only applies if the cap was too low a capacitance in the first 
place. The TB303's coupling caps to the VCA are a little on the low side 
which is why Robin Whittle suggested raising them to 100nF.

The SH101 has fairly generous coupling caps to both the filter summing 
stage and the VCA. You could raise C45 and C53 to 22uF 25V, but my bet is 
that the effects are not going to be audible. The current roll-off is 
around 15Hz due to the VCA coupling caps.

You would have better luck using a decent EQ channel on the sound. This 
could be used to reverse the small loss in the 20Hz to 40Hz region.

Tony

www.oakleysound.com