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560: Difference between revisions
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Mains power first passes through transformer T601, | Mains power first passes through transformer T601, | ||
which produces unregulated AC heater current and 170 Vrms for the second part of the power supply. | which produces unregulated AC heater current and 170 Vrms for the second part of the power supply. | ||
The second part is a regulated Armstrong power oscillator operating at 25 kHz, using transformer T620. | The second part is a regulated Armstrong power oscillator operating at 25 kHz, using transformer T620 and a V620, a [[6DQ5]]. | ||
The secondary outputs of T620 are simply rectified and filtered, producing -12 VDC, +125 VDC, -100 VDC, | The secondary outputs of T620 are simply rectified and filtered, producing -12 VDC, +125 VDC, -100 VDC, | ||
and -3400 VDC. | and -3400 VDC. | ||
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And additional efficiency is gained by the 560's power supply because it doesn't need to supply | 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. | heater current to all of those tubes. | ||
The 560 provides a maximum of 25 watts of DC power to the plug-ins, combined. | |||
That is a lower maximum than other 560-series mainframes. | |||
Plug-ins whose model number starts with a 3 (e.g., the [[3A6]]) | |||
are not electrically compatible with the 560 because their power draw exceeds what the 560 can provide. | |||
==Specifications== | ==Specifications== | ||