RANDOM*SOURCE
5
Serge SSG
10. Solder the banana jacks in. You can either solder them directly to the surrounding vias (ring
round) or - which makes removing easier should you ever need to do that - by inserting a stiff
(bare) wire into the little hole (via) and solder that wire to the top of the banana jack:
11. Attach any screws / spacers if desired and mount the main pcb onto the component pcb.
12. Connect a power cord sup12V, GND, GND, -12V to the MTA-header on the main board and
you should be ready to go :-)
Calibration
There’s one trimmer for each side that - among other things - determins the range covered by the RATE potenti-
ometers. The most efficient way for the Smooth Generator seems to be:
1.
Turn on Cycle mode by patching CYCLE into IN and turn up the RATE pot to maximum.
2.
Try to increase the speed / frequency of the cycle using the trimpot. From a certain point on, the
trimmer will not have any effect on the speed / frequency any more. Turn back the trimmer to find
the spot where it is about to slow down the cycle. Keep the trimmer right at the point where the
speed is still maximum.
For the Stepped Generator the procedure is basically the same, but you have to run a (high frequency) pulse
wave into the SAMPLE jack (the Stepped side doen’t cycle without a pulse into SAMPLE). Observe the output
(using an oscilloscope if possible). As on the Smooth side, adjust the trimmer for the spot where the speed is
still as fast as possible. If you turn back the RATE pots to minimum, the CYCLE should now be very slow on
each side.
If you installed trimpots for
LED brightness
on the component pcb, adjust them according to taste.
