Cassette Amplifier (CB21971E)

Using the CA3130, this NAB EQ preamp has excellent gain. The power supply does not have to be symmetrical.

12 V Battery Charger (CB17546E)
This type of circuit and with this integrated circuit appears several times on this website. The...
Crystal Controlled Multivibrator (CB23783E)
Using transistors of the time, this circuit was published in Radio Electronics magazine in...
Integrated AM Radio (CB18179E)
The integrated circuit used in this 1982 project is not very common today. It can be adapted to...