DH>Some of the effects boxes which are designed to add "tube" sound will
DH>run the tubes in a starved condition - the voltages fed to these tubes
DH>will be several times less than what they normally use for operation.
DH>A typical low-level amplifier ( 12AX7 ) runs at 150 to 300 volts  on
DH>the plate.  The PAIA design for tube pre-amp uses 45 volts.  Lots and
DH>lots of really nice warm tube sound!
I was once told that very high plate voltages will tend to
choke off the high harmonics.  Zat so, do you know?
Tube guitar amps tend to run 12AX7's (7025's) at 150-250 volts,
mainly to get high gains.  The old 50s amps ran them at 100-125
volts, and sound sloppier but defintiely warmer.
 * SLMR 2.1a * If crytography is outlawed bayl bhgynjf jvyy unir cevinpl
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