C22 Preamplifier With Tube Voltage Regulator - Analog Metric C22 User Manual

[C22 VACUUM TUBE PREAMPLIFIER COMPLETE USER
2. Either connect delay output protection module (optional) to the jumper J6 and J7 or
short it.
3. Connect the power transformer 280-300V AC, 12-15V AC, and 6.3V AC to the board,
without plugging the vacuum tubes.
4. Measure the AC voltages at the connectors to see whether the voltages are maintained
that are 280V AC, 15V AC and 6.3V AC.
5. If the voltages are correct, plug in the tubes and turn on the main power.

C22 Preamplifier with Tube Voltage Regulator

1. Connect an IEC power socket and a power transformer T120 as shown in Figure 1.
Two secondary windings (115V) of the transformer T120 are connected either
serially or parallel for main power supply of 220V or 110V, respectively.
Figure 1: Connection diagram between IEC power socket and the power transformer.
2. Connect the secondary windings (two 360V, 5V, and 6.3V) of the power transformer
to the connectors (J1, J2, and J3) of the tube voltage regulator respectively as
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