 The 12Vac PS is a power supply that delivers a regulated 12.6Vdc (or 12Vdc) heater voltage and uses a full-wave rectified octupler rectifier circuit that delivers over 100Vdc from a 12Vac transformer or wallart. $59.00 |  The new PS-24 high-voltage power supply uses a full-wave voltage doubler rectifier configuration and an RC filter to provide suitable B+ voltage for a tube power amplifier. The PCB requires a 100Vac to 170Vac secondary winding to power the power supply. The RC filter consists of a 20 to 300 ohm series resistor (R3) and two 470uF capacitors (C3 & C4) in series, effectively making a 235uF/500V capacitor. $29.00 |