channel 2. Channel 2 controls channel 1 when link is
in.
2.8 Pre-sets
There are four pre-sets on the compressor chassis.
The two just behind the front panel controls are to
adjust for minimum low frequency distortion. They are
set up with an oscilloscope for minimum distortion and
phase shift at 40Hz. These pre-sets should not be
adjusted, unless the valves are changed.
The two pre-sets behind the meters are used to adjust
the zero points of the meters. They can be adjusted
with a long thin screwdriver, without removing the top
cover of the compressor. Zero readings will vary a little
with mains voltage and valve ageing. The zero setting
is not critical, but both must be the same if
compressing a stereo track.
2.9 Meters
The Phoenix can operate much faster than the meters
will read.
The meter scales should be used as a guide. Actual
compression will vary slightly with individual valves
and the meters may not be accurate at high readings.
©
Thermionic Culture Ltd, January 1999
6
