Simple but effective shortwave antenna amplifier

Here is a simple but effective shortwave antenna amplifier for your reference.

Don't underestimate this amplifier. If you try it, you will be surprised to find that it is very effective. Here is the circuit diagram of this amplifier:

From the circuit diagram, we can understand that this amplifier is an outdoor type. The circuit in Figure 1 is installed outdoors and is the main circuit of the amplifier; the circuit in Figure 2 is the indoor power supply box. 50 ohm or 75 ohm coaxial cable is used to connect indoor and outdoor...

As for the circuit principle, I won't go into details here, because it is very simple. Now I will briefly talk about how to make it.

Figure 3 and Figure 4 are the circuit board diagrams of this amplifier. Figure 3 is the main circuit board, and its actual size is 6.4 cm × 2.4 cm; Figure 4 is the power supply box circuit board, and its actual size is 5.1 cm × 3.1 cm...

After processing the circuit board according to the diagram, the next step is to select components. In the circuit of Figure 1, L1 uses a 1uH color-coded inductor, and the resistor and capacitor are selected according to the values ​​in the figure. The triode uses a high-quality, low-noise ultra-high frequency tube. In addition to the 9018 in the figure, 9016, 1359, etc. can also be used. L2 is wound with a waste middle circle, and the wire diameter is the same as the original middle circle. The number of turns is 300. D1 and D2 are both indicator lights and voltage stabilizers. L1 in the circuit of Figure 2 is made in the same way as L2 in Figure 1. The fuse can be selected as 100mA. The other components are the same as Figure 1 and are selected according to the figure.

As long as the components are selected correctly and soldered properly, the amplifier will work properly...