Adjustable reference (CB21540E)

We found this circuit with 5.3V zener in a Philips publication from the 60s. The op amp could be a modern equivalent.

100 MHz ECL Oscillator (CB7480E)
ECL logic circuits can operate at very high frequencies. This circuit was obtained from a 1977...
Automatic security flasher (CB9783E)
Found in documentation from the 1980s, this circuit can have several adaptations to use modern...
Small MW Transmitter (CB12825E)
This transmitter sends its signals to a MW radio over a distance of a few meters. The antenna must...