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560: Difference between revisions
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All regulation is performed by controlling the grid voltage on V620, the power oscillator tube. | All regulation is performed by controlling the grid voltage on V620, the power oscillator tube. | ||
In principle, the design used in the 560, which resembles a modern SMPS supply, | |||
like that in a [[7704]], | |||
can offer higher efficiency and lower tube count compared | |||
to the power supply of the [[561]], which uses a traditional design more similar to a [[545]]. | |||
The increased efficiency comes from the elimination of series regulator tubes, | |||
which typically operate with around 100 V across them. | |||
The tube count reduction comes from eliminating the pass tube and the | |||
error amplifier for each regulated voltage that the power supply produces. | |||
And additional efficiency is gained by the 560's power supply because it doesn't need to supply | |||
heater current to all of those tubes. | |||
==Specifications== | ==Specifications== | ||