| The
Bias Rite Cathode Current Monitor is a self contained unit
designed to allow the user to set the desired idle cathode
current value with the G1 bias control. Two adapter sockets
are provided so the power supply may be loaded as it would
be in normal operation, an important feature since most amplifier
power supplies are unregulated. Four adapter models are also
available. The Bias Rite is supplied with an integral digital
readout which measures the cathode current to the tenth of
a milliamp over a range of 1 to 199 milliamps. Power is supplied
by an internal 9 volt battery. The
VI option allows one to switch the digital meter between
reading plate voltage and cathode current. This allows one
to quickly calculate plate dissipation to ensure that the
operating parameters of the output tubes are within a safe
range.
They
an absolutely great little device that is almost essential
if you are building & experimenting with tube amps (much
much easier than removing the chasis & using a multimer
every time).
Also
makes for a very quick & Accurate Tube Matcher!
The
2 models we have available are the BR2 (for 2 output valves)
& the BR4 (for 4 output valves) - both with the V1 option
which also measures the plate voltage. Both of these units
allow you to switch the readout between a any output tube
connected & the plate voltage.
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