Power supply: DC 9V-14V Antenna: 50 ohm, unbalanced Receive quiescent current: 12mA 9V mitting power: 12V/3W, 9V/2W Frequency range: mitting local oscillator 7.023MHz, receiving local oscillator 7.023-7.026MHz (7.023MHz crystal oscillator) Working mode: CW Circuit principle The core of the receiving part is a NE602. After the signal from the antenna passes through a and an attenuation potentiometer, it enters the mixer. The oscillation circuit oscillates at the receiving frequency. After the two signals are mixed, they are reported directly to SSB/ The CW signal is converted into audio frequency, and the audio output by NE602 is then sent to LM386 for amplification, thus completing the whole process. Therefore, a receiver that directly mixes RF signals into audio is called a ""DC receiver"". The mitting part uses the oscillation circuit of NE602, and then uses 9018 as buffer amplification. 9018 also serves as the mitting key to control the switching of the ceiver circuit and signal. The final stage is a Class C amplifier composed of D882. The amplified high-frequency signal passes through the LPF After filtering, connect the antenna. Colour:Photo Color Material:ABS Package Contents: 1 set x frog kit (delivered in parts, without shell) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.