I found this high-voltage regulator circuit in an old copy of Wireless World, but it just doesn't make sense to me.
As I see it, if the output voltage were to rise, then the base of Tr3 will rise which will tend to turn it off. That it turn will tend to turn Tr1 on harder, increasing the output voltage. Isn't this positive feedback, which wouldn't be a very good idea for a regulator?
As I see it, if the output voltage were to rise, then the base of Tr3 will rise which will tend to turn it off. That it turn will tend to turn Tr1 on harder, increasing the output voltage. Isn't this positive feedback, which wouldn't be a very good idea for a regulator?
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