This circuit with 24 dB per octave attenuation was found in the November 1973 Radio Electronics magazine. The components are for 1 kHz but can be recalculated for other frequencies.
This circuit was found in an old Popular Electronics. With it we can check the operation of a...
This circuit is from a documentation from the 90s. The transistor can be any general-purpose FET...
This circuit is from old documentation, but can be easily assembled as components are still...