Calibration
There are two trim pots on the Lorelei PCB, as shown below:
“RV5”, marked “Amplitude”, sets the internal level of the module and so the operating point of
the wave shaping. It should be set so that the waveform observed at the test point “TP2” is 2
Volts peak-to-peak. You should not need to adjust this unless you fnd that the output
waveforms cannot be set to completely clean sine waves at either end of the wave shape knob.
“RV6”, marked “V/oct trim”, controls the pitch tracking of the oscillator. This needs to be set
carefully to obtain the best possible tracking. It is factory calibrated, but you may fnd you need
to recalibrate if your environmental conditions are much diferent to those in the factory, or
simply as the module ages.
Where to get help
Email, forum, and social media links can be found at the bottom of every page on
Acknowledgments
Black and white photography by
2 https://www.expert-sleepers.co.uk
3 http://israeldenadai.com.br/bw
