Tube Power Source (CB6743E)

This circuit is from a high voltage tube source. It does not include the filament voltage that must be supplied by a separate transformer.

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Compact Multimeter (CB3871E)
The accuracy of this multimeter depends on the accuracy of the used resistors. The circuit uses a...
Infrared detector (CB7108E)
This circuit was found in a Philips documentation from 1967. The circuit uses components from the...
Low Frequency Prescaler (CB6523E)
This circuit was found in an 80's Radio Electronics. The circuit multiplies the frequency of a low...