DC Heater Supply for Valve Power Amplifiers

Описание к видео DC Heater Supply for Valve Power Amplifiers

Looking at a design for a DC valve heater (tube filament) power supply.

An off the shelf switching supply is modified and additional circuitry employed to clean up the supply and add a true soft start function.

There are other circuit arrangements that do similar things, a current limiter is the obvious one. Current limiter circuits come with extra losses however, probably near 3 watts in this application and the soft start does not start from zero volts.

This is a building block for a Valve Power Amplifier.

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