This bench circuit was found in Radio Electronics magazine from June 1958. The circuit does not have an external power supply. The circuit generates signals from 12 Hz to 180 kHz in 4 bands.
This application of the RCA integrated circuit released at the time was found in the August 1970...
These basic filters, the second one being operational, were published in the November 1973 issue of...
This circuit adds the voltage from the secondary of a transformer to an outlet connected to the...