It may cause oscillated with the active antenna and radio receivers. Use DC power supply between 6VDC to 15VDC.The cable is used should be the low capacity like use in the car and should not be used without a shield cover. Use the shorter coaxial cable of 50 ohms or 75 ohms from the antenna to this circuit and the radio receivers, too.And connect the antenna cable into the jack and the output should be as short as possible. To make a circuit can work well in the circuit wiring. If a metal box would be better to reduce noise that may occur better. This circuit can be packed into a plastic box.Because want to amplify the so signal at lower frequencies.įor those who want to apply to the short-wave band. That is the Shock Coil (RFC) to the appropriate band to use. But there are details that must be considered as follows. It will not work well.Īlso: FET Signal amplifier high impedance (simple circuit) Experiments built Which designer wants to use with an untuned antenna like in the car radio.īut we use the active antenna with radio amateur receivers. And, the output high impedance is able to work well with a cheap radio. Is it easy? Yes, it is an untuned circuit.
It becomes a clearer signal.Īnd, when using the FM tuner will make for a better signal than the antenna the attached receiver. Previously, some stations were poorly received. When used with a conventional MW radio receiver. They have similar results with the shortwave radio antenna size 20-30 feet. In experiments using this circuit with many a short wave radio.
This circuit is the easiest with only one FET. Which type will you choose? Start with a simple circuit first, right? Simple Active Antenna amplifier circuit Of course, a simple circuit, the quality will suffice for normal use.īut the second circuit has more equipment. There are differences, in the simplicity and the details of the circuit.
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