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FRONT PANEL
Power Lamp with Jewel
When lit, this indicates that mains power has been applied to the amplifier. It houses a
6.3V 10mm bayonet filament bulb which can be replaced by unscrewing the jewel from
the front.
OFF – PREHEAT – ON Switch,
Ensure this switch is in the up, (OFF) position before applying mains power. Then switch
to the center position, (PREHEAT). The amplifier is now in ‘PREHEAT’ or ‘STANDBY’ mode
with just the valve heaters and low voltages on. This allows the valves to heat up before
they get 100s of volts up them, (it’s less of a shock). After around 60 seconds, the amp can
be switch to the down, ‘ON’ position. Due to recent EU regulations on the use of Standby
functions and their associated low-power requirements, we are replacing this function
with PREHEAT to avoid any legal confusion. There will be no difference in operation of
the amplifier. When switching the amplifier ON or OFF please ensure the Volumes are
turned down and you leave at least 30 seconds before switching from Standby to Off. This
will ensure extended valve life and avoid any power-down noise. This is especially
relevant if you’re running through a large PA system as any small pop may become
amplified to audience damage levels, which may limit your music career.
Tremolo Depth.
This controls the Amplitude Modulation of the Tremolo effect, turning the volume of the
output stage up and down continuously to varying degrees depending on where the
control is set. Basically, it controls the amount of Tremolo effect.
Tremolo Speed.
This controls the speed of the Tremolo effect. Please experiment in conjunction with the
Depth control to find the most pleasing settings for your sound.
Master
The Master Volume control is used to set the stage or overall volume of the V40D. If this
is turned to maximum, then the V40D becomes a non-master volume amplifier where the
Input Volume control in conjunction with the Volume control on the guitar allows for a
wide range of Volumes & Gains to be achieved. This can be very powerful for tone
shaping.
