Thermocouple amplifier (CB9844E)

Found in documentation from the 90's, this circuit can be implemented based on modern operational amplifiers. The power supply must be symmetrical.

Sub Carrier Generator (CB4241E)
The basic purpose of this circuit is to apply an audio signal to a video carrier for sound and...
30 MHz preamplifier (CB9151E)
Found in a 73 magazine for radio amateurs of the 1980s, this circuit uses a dual-gate MOSFET. This...
Sound-activated relay (CB7087E)
We found this Vox in a 1969 Motorola documentation. Transistors support modern equivalents and the SCR can...