GlassWare Audio Design
Thanks for Supporting the Tube CAD JournalNew Balancer PCB and Kit
New PS-11 High-Voltage Power Supply Kit
Product Description
The PS-11 circuit board makes life quite a bit easier for the tube fancier. On this small three by six inch, extra-thick (0.094), 2oz-copper traces, USA-made PCB resides a high-voltage power supply suitable for powering a tube power amplifier. The PS-11 includes both the rectifiers and power-supply reservoir capacitors. The high-voltage portion of the PS-11 power supply uses a high-speed solid-state full-wave bridge rectifier circuit and three RC filters to achieve a fairly quiet B+ voltage, up to 500V.
The PS-11 presents three outputs: the B+ for the output stage, the B+ for the driver stage, and the B+ for the input stage. The input stage and Driver voltage outputs can be shunt regulated by using high-voltage zeners in series (Z2 to Z6), which will establish a fixed B+ voltage for the input stage.
No heater power supply is contained on the PCB, as tube power amplifier usually use AC voltage on the heaters. But the PS-11 does hold a two-resistor voltage divider circuit to reference the AC heater winding to the high-voltage power supply, which helps prevent hum.
The PCB is 3 inches by 6 inches. Kit includes all parts needed to populate the PCB, with four standoffs and extra resistors. Obviously, the required power transformer is NOT included.
The PS-11 presents three outputs: the B+ for the output stage, the B+ for the driver stage, and the B+ for the input stage. The input stage and Driver voltage outputs can be shunt regulated by using high-voltage zeners in series (Z2 to Z6), which will establish a fixed B+ voltage for the input stage.
No heater power supply is contained on the PCB, as tube power amplifier usually use AC voltage on the heaters. But the PS-11 does hold a two-resistor voltage divider circuit to reference the AC heater winding to the high-voltage power supply, which helps prevent hum.
The PCB is 3 inches by 6 inches. Kit includes all parts needed to populate the PCB, with four standoffs and extra resistors. Obviously, the required power transformer is NOT included.
