Nice design. This is your circuit:Although the discussion, so far, has focused on power amplifiers, tube preamplifiers can also benefit from regulated power supplies. The regulated power supply I built for my Heathkit WA-P2 is an example that can easily be adapted to a power amplifier by increasing the size of the pass transistor heat sink. See post #9 in the following thread: http://audiokarma.org/forums/index.php?threads/heathkit-preamplifier-model-wa-p2-–-power-supply-–-what-are-you-using.721788/#post-9731055
I put in some numbers so if anyone care to look deeper into how this regulator works. It's clever, Q1, D1 and Q6 replace a whole stack of zener and provide reference voltage with only about 1mA consumption. This is much lower than if you use zener.
People have different ideas and we can all learn if we just take a minute to study through other's designs. This make regulated supply easier. I just don't like the stack of zener and the current it takes to stabilize the voltage. This one relies of R1, R2, R3, R4 and R7 with D1 to set the output voltage.
Nice circuit. I take note on this.
One note of caution using regulated supply in general, you have to watch out power dissipation of the MOSFET, line voltage goes up and down, so is the raw rectified voltage. When you regulate the voltage, the change of raw DC might put extra power dissipation on the MOSFET. eg. if the raw DC goes up 10V, the power dissipation on the MOSFET will increase by 10V X I. For power amp, this might be very high.. That's the reason I apt for kind of pseudo regulated, more getting rid of the ripple by let the output voltage floats with the raw average voltage. I minimize the power dissipation of the MOSFET.
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