Maintenance Section; Tube Layout; Bias Procedure - RedPlate BlackVerbDue Operation Manual

RedPlate BlackVerbDuo Operations Guide
1. Check the Standby switch to make sure it is toggled downward for Standby operation (the
Standby switch is located just to the right side of the power cord/IEC).
2. Toggle the main power switch to the up position (this switch is located at the top of the IEC
input module). The front panel pilot light should be lit.
3. Wait one minute and then toggle the Standby switch upwards to the Operate position.
4. POWER OFF – Toggle the main power switch downward, there is no need to go into
standby first although it will not hurt anything.
Your BlackVerbDuo amp has been designed for years of trouble free operation. The vacuum
tubes will need to be replaced over time. We recommend new output tubes every 160 - 240 hours
and new preamp tubes every 320 - 480 hours.
The front and rear panels have a protective finish that can be easily scratched with abrasives
so always use a damp soft cloth to clean them (never use paper towels). The cabinetry can be
cleaned with our super secret tolex cleaner (on a paper towel - 2 squirts of WD-40 and 4 squirts
window cleaner), let your keyboard player try it on his plastic keys, it replicates the feel of a brand
new keyboard.
All tube brands are acceptable, a long plate is preferred in the V7 (Phase Inverter) position.
Warning – No user serviceable parts inside so unless you know what you're
doing please refer to a qualified service person only.
1. When new output tubes are installed it is important to re-bias the amp for optimal
performance. No biasing needed for 6V6 tubes because they can only be used in cathode
bias position.(50 Watt 6L6 amp only)
2. ALWAYS HAVE A SPEAKER CONNECTED.
3. Use a digital volt meter set to DC volts at lowest scale (MV). Makes sure the black lead is
the common terminal of the meter and the read lead is the DC voltage terminal of the
meter.
4. Place the Amplifier in operate mode with the Master Volume and Reverb controls set to
zero.
5. Set the 50 WATT/ 40 WATT switch to the 50 WATT position. (ex. 50 Watt 6L6 amp)
6. Place the red meter lead in the test point hole (red tip jack) And touch (or clip) the black
meter lead on one of the metal output tube retainer clips.

MAINTENANCE SECTION

TUBE LAYOUT

BIAS PROCEDURE

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