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Old 4th Dec 2021, 11:51 pm   #22
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 6,212
Default Re: Practical Electronics. Battery Valve Radio Power Supply.

Here's the circuit diagram of the filter, and of the supply module itself.

As stated, it's not an optimum design: there are better ways to control the thing than twin 555's, comparators, and TL431 references. But it was designed around ubiquitous IC's rather than dedicated types.
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