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 low-frequency relay oscillator was obtained from an article in Electronics Now magazine in...
This circuit is regulated by zener and provides a voltage of 9 V. The circuit is from a Radio...
We found this HV generator circuit in a 1967 publication. It can be fitted with SCR TIC106 and the...