space
Expression pedal
input allows the speed of the
sweep to be controlled with an expression pedal,
such as the Roland EV-5 or EV-7. If using a
modified passive volume pedal, the internal
potentiometer must have a resistance of in the range
of 10K to 250K and should be connected as shown
in the figure below.
Tip: wiper (pin2)
Ring: +5V (pin 3)
Shield: GND (pin 1)
External VCO
The
Tube-Vibe
modulation speed
can also be controlled using an external VCO
(voltage controlled oscillator). Voltage range must be
0 to 5 volts.
pace
C o n t r o l s
Speed
knob controls the rate of notch sweep across
the audio spectrum. In counter-clockwise positions
the modulation rate will be at it’s slowest to create a
dreamy, swirling and spacious effect. Turning this
knob fully counter-clockwise will ‘freeze’ the
sweeping of the notches to produce hollow sounding
acoustic timbres. Rotating the knob clockwise
produces a progressively deeper, swampy sound
simulating a ‘Leslie’ rotating speaker system.
I
ntensity
knob is used to restrict the sweep of the
vibe for more subtle effects. In chorus mode it
controls the thickness & throb of the vibe sound.
Centering this knob at the 12 o'clock position is good
starting point for achieving a classic Uni-Vibe chorus
effect. In vibrato mode, it minimizes pitch de-tuning,
making the sound more useable (slow vibrato with
full sweep produces a seasick sound).
Volume
knob sets the output level when the Tube-
Vibe is engaged. In the centre 12 o’clock position
gain is roughly unity. Turning this control fully
clockwise yields a substantial +6dB of gain boost,
which allows this pedal to be seamlessly matched
and integrated into any rig or studio set-up.
Chorus/Vibrato
switch selects between the classic
Hendrix/Trower Uni-Vibe chorus (switch ‘down’) and
de-tuning pitch-bend vibrato. (switch ‘up’)