Model contol (CB22185E)

This miniature railway control circuit was found in an English documentation from the 1980s. The integrated circuit is an operational amplifier.

| Clique na imagem para ampliar |

Two-band loop antenna (CB6979E)
Found in Popular Electronics from the 1980s, this circuit can use more modern transistors such as...
Mixer CA3035 (CB23997E)
This circuit is from a Radio Electronics from February 1970. The integrated circuit is an...
Transformer Amplifier Stage (CB966E)
This is stage is transformer coupled and was found in na old publication of the year 1958. The...