TRACE ELLIOT Tramp Operating Instructions Manual page 4

Channel one treble, mid, bass
The 3 band passive EQ network has been primarily voiced for clean sounds. As the circuit is of the passive
variety, all the controls are interactive and will have a pronounced effect upon one another. Experiment with
the settings to find a sound that suits your guitar and style of playing. If you turn all three controls to their
minimum positions, no sound is allowed to pass through the circuit so you will not hear anything.
Channel one/two select switch LED
This push switch is used to select between channels one and two. If you are using a footswitch (plugged
into the appropriate rear panel socket) to select this function, ensure that the push switch is in the OUT
position or you will not be able to select channel one. When channel two is selected, the LED immediately
above the switch will illuminate.
Gain
This control determines the input gain of channel two. When operating in 'vintage' gain mode (when the
GAIN BOOST LED is OFF), all of the overdrive available on channel two is derived from the ECC83 preamp
valve. Therefore this control can be thought of as the 'valve gain' control for the second channel. The degree
of gain available in this mode varies from almost clean, through 'bluesy crunch' to a heavy overdrive
suitable for almost all styles of rock/pop and contemporary blues playing.
Channel two/three select switch and LED
This switch selects between the two modes of operation of the overdrive channel, and activates the GAIN
BOOST control to further increase the amount of gain available. When 'high gain' mode is selected, the LED
immediately above the switch will illuminate. When using a footswitch to control this function, ensure that
the front panel switch is in the OUT position, or you will not be able to select 'vintage gain' mode.
Gain boost control
When 'high gain' mode is selected (the channel three select LED is illuminated), extra preamplifier gain is
available. The amount of extra gain is determined by the position of this control. The additional overdrive is
provided by two cascaded FET gain stages (which are switched into the circuit using a relay), so that this
control can be thought of as the 'FET gain' for the overdrive channel.
The additional gain is provided after the valve stages, so the GAIN BOOST control should be used in
conjunction with the GAIN control for channel two/three to set the overall amount of preamplifier distortion
required.
It is not recommended to use the amplifier with both GAIN and GAIN BOOST on their maximum settings as
the overall amount of cascading gain available is so high that the amplifier will be liable to feed back at
anything above low level practice volumes.
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