RANDOM*SOURCE
RANDOMSOURCE.NET
4
Serge TWS+
Options
A. Selectable output DC / AC via jumper
There are 3 jumpers provided for on the pcb - each to allow to set the output of that section to unipolar (DC,
about 0 to 5V) or to AC (centered around 0V). By default, the board is already jumpered to DC - consistent with
the white jacks on the front panel.
So there is no need to do anything to use the module
.
However, if you want to be able to jumper each or some of the optputs to AC, you have to (for each output):
1.
Remove the 0R resistor (link) next to the jumper pads
2.
Install a big 47uF electrolytic cap - I use Nichicon BP (bi-polar / non-polar) audio grade, BP should not be needed,
however I have not tried any others.
3.
Install 3 pin jumpers as indicated on the pcb and set the jumper to either AC or DC. (Output will not work if you do
not set the jumper where you have removed the 0R resistor).
If you decide to implement the jumpers, it is easiest to do this as the first step - in particular before you attach
the front panel and solder the pots etc.
B. Gain trimmers
The pcb is pre-configured so you don’t need any trimmers or trimming. Using trimmers could allow you to adjust
the output level of each section precisely. However, due to the nature of the module and DC offsets involved in
teh folding action, I see no reason to try that - the default should work nicely.
Just be aware that you cannot
simply install the trimmers
, you would also have to remove 2 resistors first.
So the simple recommendation is:
Do not install the trimmers
.
Calibration
No calibration needed :-)
Power consumption etc.
Power consumption: <=20mA @ +12V and <=10mA @ -12V
Module width: 18HP, depth: < 30 mm
(Last changes: 11. July 2019, 9:57 PM)
SERGE Modular by Random*Source. Module and circuit under license from Serge Tcherepnin. All rights reserved.
