Modulated Crystal (CB7931E)

This circuit allows modulating the signal generated by a crystal oscillator. The circuit is from the 80s RCA linear integrated manual.

| Clique na imagem para ampliar |

nic Switch - Vox (CB10585E)
So This circuit was published in a 1982 English magazine, but can be easily assembled using BC548 for...
AM PLL tuner (CB20236E)
With this circuit it is possible to tune an AM signal using a 5k potentiometer (4k7). The circuit was...
12 44 and 50 V regulated power supply (CB8680E)
This power source was found in a 1968 Electronics World. The transistors are from that time. The...