L-124 Harmonics LFO (4HP)


L-124 Harmonics LFO module for Eurorack/Doepfer A100 system.

From top:
rate knob + CV input jack + rate LED
four level knobs for harmonics
output jack + 2 polarity LEDs

L-124 is sinusoidal LFO, rate range of fundamental is from over 5-minute period to 20Hz. Set of harmonics (2nd, 3rd, 4th, 5th -or- 2nd, 3rd, 5th, 7th, jumper selectable) can be added to fundamental frequency in ratios set by knobs. Jumper header set = 2345, removed = 2357. Rate knob works as attenuator for input CV if rate CV jack is plugged-in. Under about 1Hz (= slow rates) rate LED blinks dimmed/full brigthess to show LFO is still moving (output changes really slowly). Output level 10Vp-p (-5V to +5V), distortion of fundamental sine is under 0,2% (quite good for LFO).

Examples of output waveshape:


2nd harm at 50%,

2nd at 50% + 3rd at 50%,

4th at 50%,

3rd at 25% + 4th at 50% + 5th at 50%,

2nd at 60% + 3rd at 60% + 5th at 25% + 7th at 60%

Width: 4TE/ 4HP/ 20mm
Depth: 45mm /1,8″ max.
Current: 35mA max.
Power cable included

Double check power connection before powering your system please.
„Red strip“ means -12V connector side in Eurorack standards.
In some power distribution systems connector key can be reverted.
In this case cut connector key and plug power connector right way (with respect to red strip) or use different power cable appropriate to your power system

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