Thermionic Culture Ltd. 2021
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3
General Operational Hints
When just
"
warming” the sound use
'
T’ or ‘P1’ settings with
output level control at 8-10. Turn down the control as you
increase input level and/or increase V2 current settings. Turn to
max for
'
P3’ applications.
The
"
cleanest” setting for the ‘‘Bias is usually 0.22 to 0.32mA
and
'
T’ function, this should be used to give sounds just a bit
more
'
naturality’. Check test report.
A good setting to simulate analogue tape distortion is
'
T’, normal
drive, meter set to 0.3-0.4 mA.
A generally popular setting is
'
P’ 0.4mA with ‘Output’ level
reduced accordingly.
When used with low amounts of drive these settings can appear
to enhance the warmth and size of the audio and can be used to
reduce unwanted transient peaks, much like a limiter, resulting
in a louder sounding output.
On the
'
P2’ & ‘P3’ settings, a characteristic of the type of valve
used is that a frequency doubling effect can occur when
distortion sets in, due to waveform rectification. This can be
quite interesting and is most likely to occur with high ‘Bias’
(around 0.1-0.2 mA current).
Use the ‘+10’ setting of the ‘
D
rive’ switch if you want a little more
'
bite’ or brightness. There may be sufficient gain to use this
setting for some electric guitars when DI
’
d, if a low ‘Bias’ (high
current thru V2) is used. Otherwise, use the ‘
O
verdrive’ setting
when DI-ing guitars. Of course, you can chain the 2 channels
together, using ‘Overdrive’ on the first for extreme effects.
Use the
'
Filter’ switch to reduce unpleasant upper harmonics,
especially useful when using
'
P2’ & ‘P3’ effects.
Summary of Contents for The ULTRA Vulture
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