R E V I S I O N N O T E S
1 0
2008-2014
How does Grendel Drone Commander Classic Pedal differ from the original ammo can version?
The DC input jack is now tip negative. This lets you power it with FX pedal-style 9VDC adapters and daisy-
chain power with other stomp boxes.
Protection against over-voltage damage caused by connecting an incorrect AC adapter has been added. The
unit has a built-in self resetting fuse. (Trying random junk-box AC adapters is no longer a risky maneuver.)
The power switch is gone. If running on battery, unplug the audio output cable when the unit is not in use.
Power Supply
Filter section
The Filter CV In jack now sums its modulation with the internal LFO, so both modulations can be used simultaneously. (The original
ammo can disconnects the internal LFO from the filter whenever something is plugged in to Filter CV In.)
Front panel port to access to the filter drive trimmer has been added. Use a 2mm at blade screwdriver to adjust this control. The
factory setting is 50%.
The main LFO now can reach slower frequencies.
The PULSE LFO now can track the main LFO at higher frequencies, extending into the low audio frequency range.
The PULSE LFO has been stabilized so that adjusting the 2-4-8-16 knob does not disrupt its rhythm.
The Filter CV In jack now sums its modulation with the internal LFO, so both modulations can be used simultaneously. (The original
ammo can disconnects the internal LFO from the filter whenever something is plugged in to Filter CV In.)
An LED has been added that ashes once per LFO cycle.
The Shape knob can now be set to fully eliminate the sharp click from the LFO cycle, giving a smoother ramp modulation.
LFO section
Gate control, envelope generator, and VCA have been added, controlled by the stomp switch and Gate In jack.
The push-pull potentiometer switching has been replaced with toggle switches.
External Audio In has been added. Patching to Audio In disconnects the internal oscillators. To simply mute the internal oscillators,
as was done in the ammo can model by pulling up the MIX knob, dead-patch the Ext. Audio In jack.
Et cetera...
Grendel Drone Commander
Classic Pedal
