Power source for tubes (T384E)

This experimental bench source was found in a modern book on tubes. The components used can be easily obtained.

Temperature Controller (CB6010E)
This triac temperature control circuit was found in an 80s power semiconductor documentation. The circuit...
Complete Shift Register Using the 4027 (CB157E)
Figure bellow shows how n flip-flops can be associated to perform a shift register. Data is...
Automatic Station Finder (CB4318E)
This circuit is from 1986 documentation, being adaptable in radios of that time. The circuit uses the...