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HEADPHONE OUTPUT ATTENUATION
By default the Virgil OB
’s front panel headphone volume potentiometer is set to allow
an output level off between -20 and +10dB (measured into 600 Ohms). This means
that incoming audio signals cannot be completely turned off (which many
broadcasters find useful to stop ‘talent’ turning important audio information off and
missing vital cues).
It is possible to alter the range of the volume potentiometer to allow the headphone
output to become fully attenuated (off). Note: Virgil OBs can be supplied like this
straight from the factory by special order.
How To Change The Output Volume Range
This is done by linking out a pair of hardware resistors that stop the potentiometer
fully closing. There are 2 pairs of solder pads on the internal pcb to make this job
easier.
1) Remove the 4 screws that hold the bottom plate onto the unit. Note this is the
plate that has the beltclip attached.
2) Remove the bottom plate.
3) Locate the 2 pairs of solder pads located just behind the potentiometer.
4) Carefully form a solder bridge between each pair of pads.
5) Rebuild the Virgil OB in the reverse order of dis-assembly.
