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Output Tubes
– Your unit comes from the factory set up and fully run in
for 6550 type output tubes. Replacement tubes that match your output tubes
are available from the factory. Look up the number on you output tubes and
ask for the same code number. You can generally replace one or two
numerically matched tubes without re-biasing the amplifier. A full
replacement set should always be re-biased by a qualified technician. High
quality, matched output tubes will have better output power and longer
service life than will a poorly matched set.
FOOTSWITCH FEATURES
Compressor/Limiter
–Engages the Compressor/Limiter in the final output
stage of the amplifier.
Damping Selector
– This unique feature is on the foot switch of the current
(A) model. It allows the amplifier to be very flexible. In the Low setting, you
get normal vacuum tube damping response. This provides an open, round,
soft low end that works well with 4 string Basses and traditional tones. In the
High position you get a tighter, more defined sound suitable for slapping and
more modern playing styles.
EQ Bypass
– Completely bypasses the EQ section.
Overdrive
– Duplicates the Overdrive switch on the front panel.
Mute
– Mutes all outputs except the Tuner Out.
OPERATING INSTRUCTIONS
Mechanical and Thermal Issues
– During operation, your amplifier should
always be placed away from sources of moisture or heat. Care should be
taken not to obstruct the ventilation holes on the unit. The integral rack ears
can be used to install your amplifier in a conventional equipment rack for
protection during transportation.
Electrical Connection
– The VT-300B requires at least 10 Amps of
correctly wired alternating current for proper operation. Providing less than
10 Amps of power may result in poor amplifier performance and bad tone,
so it’s probably not a good idea to plug all of your band’s gear into a single
wall outlet.
