GlassWare Audio Design
Thanks for supporting the Tube CAD JournalNew Low-Voltage and High-Voltage Regulator Kits
DANGER! High-voltage power supplies contain lethal voltages and currents; thus, a real—and possibly—lethal shock hazard exists.
Ideally, a variac should be used to slowly power up the regulator, as it is better to have a mis-oriented electrolytic capacitor or a mis-located resistor blow at low voltages, rather than at high voltages. Remember that the danger increases by the square of the voltage; for example, 200 volts is four times more dangerous than 100 volts and 400 volts is sixteen times more dangerous.
Once the power supply is powered up, be cautious at all times. In fact, even when the power supply is disconnected or shut down, assume that power-supply capacitors will have retained their charge and, thus, can still shock. If you are not an experienced electrical practitioner, before attaching the transformer windings to the board, have someone who is well-experienced in electronics review your work.
There are too few tube-loving solder slingers left; we cannot afford to lose any more.
The parts used are fancy, not the circuit. An LM317 positive and LM337 negative regulator are used to establish the bipolar output voltages. It can deliver any voltage between +/-5V to +/-24V by selecting different values for resistors R3 & R4. $29.00 |
New LV-Regulator
The LV-Regulator is an audio-grade low-voltage regulator that uses a simple RC filter (1 ohm & 10kµF) as a pre-filter before the LDO regulator and holds bypass capacitors for all the electrolytic capacitors and a 4.7µF/400V polypropylene shunting capacitor at the output. Perfect replacing the cheap switcher wallwart that came with your external DAC or Squeezebox Duet or Touch. $29.00 |
New bipolar low-voltage power supply kit for solid-state projects. Uses two positive, 3A, LDO voltage regulators with separate rectifier bridges to create a bipolar power supply. Uses high-quality Nichicon Audio and Wima MKP10 polypropylene capacitors, also includes two large heatsinks. $49.00 |
The Janus shunt regulator made its first appearance in 2007 in the Tube CAD Journal. In a nutshell, the Janus shunt regulator is a tube-based regulator that uses both feedforward- and feedback-based shunt regulation to reject both the rectifier-induced power-supply noise and the signal-induced power-supply noise from its output. $59.00 |
Janus shunt regulator without heater PS or heater regulator. The high-voltage regulator uses a pure-tube, feedback-and-feedforward shunt regulator to achieve a quiet AC regulated B+ voltage, which can span from 200V to 300V. Furthermore, either a full-wave-center-tapped configuration or a full-wave-bridge rectifier arrangement can be used. The PCB even allows solid-state rectifiers to be used place of the single tube rectifier. $39.00 |
The PCB is 4.5 by 6 inches and it holds two all-solid-state regulated power supplies, a high-voltage regulator for the tube B+, and a regulator for the tube heaters. Each voltage regulator includes its own raw power supply required for feeding each regulator its raw DC voltage. In other words, except for the power transformer, the PS-1 PCB holds all that is needed to make a superb regulated power supply for tube circuits. $55.00 |
The PCB is only 4.25 by 4.5 inches and holds a single, high-voltage, all-solid-state regulated power supply for the tube project B+. The voltage regulator comes the all the rectifiers and power-supply reservoir capacitors required for feeding the regulator its raw DC voltage. In other words, except for the power transformer, the PS-2 PCB holds all that is needed to make a superb regulated power supply for tube circuits. $39.00 |
PS-3 Tube Power Supply Kit
Simple tube power supply kit holds a solid-state rectified, RC pi filtered, high-voltage power supply and a low-voltage regulated heater power supply, with each finding its own raw power supply, including the rectifiers and power-supply reservoir capacitors. $39.00 |
Simple tube power supply kit holds a simple high-voltage power supply, with an RC filter; and a low-voltage power supply and low-voltage regulator. $39.00 |
Simple classic tube power supply with tube rectifier and RC filter and heater voltage reference. $18.00 |
The PS-6 power supply offers a low-voltage bipolar output (up to +/-50Vdc), suitable for solid-state power amplifier or OpAmps; in addition, the PS-6 power supply holds a voltage quintupler that yields a single high-voltage B+ output voltage roughly equal to five times the rail voltage. For example, if the rail voltages are +/-30V, the high-voltage B+ output voltage will be about 147Vdc; if the rail voltages are +/-15V, the high-voltage B+ output voltage will be about 73Vdc. $49.00 |
The new PS-7 power supply board is only 2 by 3 inches big. Yet it can pack a punch, as it holds two 47µF/450V capacitors. In other words, it can be used to make a power supply up to a 400Vdc. $15.00 |
The H-PS-1 is a simple low-voltage regulator. You need only hook up a power transformer and the H-PS-1 will rectify and regulate the AC voltage into smooth, stable DC. This little regulator can put out up to 2.5A and it can deliver an output voltage that ranges from +5V to +25V. This power supply is perfect for the 24V Aikido line/headphone amplifier, tube heaters, and Squeezebox PS upgrades. $24.00 |
The circuit is a simple voltage doubler that converts the 5Vac into 12Vdc for the power amplifier's frontend circuitry. It is not that big a deal, but once you have point-to-point wired a few of them, you begin to long for a tight little PCB. $10.95 |
