TRM-1 Tremulator User’s Guide
There are two controls on the unit: Depth and Speed,
plus a foot switch to bypass the eect, and an LED to
indicate eect operation. On the side there is a Trim
Pot to set the bias for the optical unit.
Depth aects the amount of amplitude modulation
on the signal or the amount of eect. The Tremulator
design incorporates a small amount of gain (approxi-
mately 1 dB) to allow for proper “tremulation.” Also,
by turning the Depth all the way o, the TRM-1 will
function as a low noise volume boost. It’s low-imped-
ance output allows it to act as a line drive, eliminating
signal loss on long cable runs.
Speed increases and decreases the frequency of the
low-frequency oscillator, enabling you to time the ef-
fect as desired.
Trim Pot sets the bias of the optical tremulo unit. It aects the signal on and o time
ratio. Turning this clockwise will squeeze the signal harder, counter-clockwise will
loosen it. The unit comes preset to Ry Cooder’s favorite setting.
Input/Output
There is a 1/4” input jack on the right-hand side of the pedal, and a 1/4” output jack
on the left-hand side, with a battery switch on the input jack.
Power Supply
9 volts DC, internal or external.
Internal: 9 volt battery (for battery access, remove the four screws on the sides of the
unit and pull apart). WARNING: If battery drops below 7 volts, noise will occur.
External: 9 volt regulated power supply, mini-plug, tip positive. Recommended exter-
nal power supply is the Dunlop ECB-02.
6990 Kingsbury Road | Templeton, CA 93465 | 805-461-4100 | http://www.demeteramps.com/
