Found in old documentation, this source uses an integrated circuit from that time, which is uncommon nowadays. The power source has a ripple below 1 mV.
This simple 1-transistor receiver has speaker listening. We found it in an article published in...
In this amplifier, the supply voltage is 35 V and the input resistance is 2k2. Equivalent...
I found this circuit in an old Argentine publication from 1973. The components are no longer...