Eighth-Order Filter (CB6741E)

This low pass filter has attenuation of 5.5 dB and the frequencies depend on the values of the components in the case 1 kHz.

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NAB Equalizer (CB7307E)
This circuit was found in an American audio documentation from 1968. The configuration can be...
12 V to 10 A power supply (CB1219E)
This power supply can provide 10 A currents. Its regulation is made by 7812 integrated circuit. The...
Didactic Comparator (CB1431E)
With this circuit, of a 1977 Radio Shack documentation, it is possible to demonstrate the...