PH meter (CB20731E)

This circuit was obtained in an old American documentation. The integrated circuit used is uncommon today. Modern equivalents can be searched.

| Clique na imagem para ampliar |

25 W FM RF Amplifier (CB18820E)
With an input signal of at least 7 W this amplifier supplies 25 W in the FM band on its output. The...
High impedance comparator (CB9594E)
This circuit can be implemented with other operational ones. We found it in documentation from the...
MW Booster (CB24181E)
This antenna amplifier circuit for medium wave radios was obtained from the April 1972 Radio...