Two relay and neon shield (CB8834E)

Found in old American documentation, this circuit that can be used as a shield, activates two relays and a neon lamp with different voltages.

| Clique na imagem para ampliar |

Stabilized 2,000 Gain Amplifier (CB6643E)
This circuit was found in a 1960s documentation, providing a 2,000 gain amplified output. | Clique na...
Simple RF wattmeter (CB3892E)
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...
Band pass amplifier (CB7447E)
Suggested by Maxim in documentation from the 90s, this circuit has its response curve given next to...