Voltage controlled gain amplifier (CB8992E)

Found in a 1980s American documentation, this circuit is intended for amplifying 10.7 MHz video signals, with a gain of 100dB.

| Clique na imagem para ampliar |

Automatic Telephone Conversation Recording (CB18702E)
This circuit activates an old conventional cassette recorder when the telephone line is answered and...
Very low frequency oscillator (CB9042E)
This circuit can generate signals from 1 Hz to 20 Hz in 2 Hz ranges. The table next to the diagram...
Varicap Controlled Oscillator (CIR819E)
This oscillator produces a signal with a central frequency in 1 MHz. This frequency can be...