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560: Difference between revisions
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The 560 and 561 were short-lived. Both were replaced by the 561A, which offered | The 560 and 561 were short-lived. Both were replaced by the 561A, which offered | ||
several performance improvements, within less than a year. | several performance improvements, within less than a year. | ||
==Power Supply== | |||
The 560 has a power supply that is similar to the [[503]]'s power supply. | |||
Mains power first passes through transformer T601, | |||
which produces unregulated AC heater current and 170 Vrms for the second part of the power supply. | |||
The second part is a regulated power oscillator operating at 25 kHz, using transformer T620. | |||
The secondary outputs of T620 are simply rectified and filtered, producing -12 VDC, +125 VDC, -100 VDC, | |||
and -3400 VDC. | |||
All regulation is performed by controlling the grid voltage on V620, the power oscillator tube. | |||
==Specifications== | ==Specifications== | ||