Vivencio Flores
The PCB component side
The radio uses five silicon transistors in a superheterodyne circuit. On the topside is the tuner section comprised of the frequency converter, followed by the red oscillator coil, white input IF transformer, the IF amp transistor, the black output IF transformer and the silicon detector diode. In the center is the plastic variable condenser (PVC) tuning capacitor. At the bottomside is the audio amplifier section composed of the input AF transistor coupled to the input transformer driving two output transistors in push-pull configuration and coupled to the output transformer and thence to the speaker. To the left of the speaker is the volume control and on/off switch. The antenna coil on a ferrite rod is on the other side of the PCB.
The PCB component side
The radio uses five silicon transistors in a superheterodyne circuit. On the topside is the tuner section comprised of the frequency converter, followed by the red oscillator coil, white input IF transformer, the IF amp transistor, the black output IF transformer and the silicon detector diode. In the center is the plastic variable condenser (PVC) tuning capacitor. At the bottomside is the audio amplifier section composed of the input AF transistor coupled to the input transformer driving two output transistors in push-pull configuration and coupled to the output transformer and thence to the speaker. To the left of the speaker is the volume control and on/off switch. The antenna coil on a ferrite rod is on the other side of the PCB.