Power supply of ľNet


Intro:

This circuit originally was designed for the first Formant Modular version in the 1970'th and is built around a ľa723. The circuit can be found here. My version of it comes from the book MSS2000 by HaJo Helmstedt.

This PSU is a symmetric +15V 0 -15V unit fed by 2x 18V~. After rectification and filtering the transformator outputs are regulated by a ľa723 and the ouput voltages of +15V and -15V are current fed up by two 2n3055 transistors (up to 3 Ampčre per side).

The power supply voltages can be obtained at 31 power terminals.


Board of PSU:




PSU in the ľNet:




Back side of ľNet with power switch and power transistors:




Reproduction hints:
None.
Please send questions or remarks to:
Carsten Toensmann

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