Feature:1. The whole machine contains 7 triodes, so it is called 7tube radio.2. Triode V1 is the frequency conversion tube, V2 and V3 are the medium amplifying tube, V4 is the detection tube, V5 is the low frequency preamplification tube, and V6 and V7 are the low frequency power amplifier tubes.3. The secondary medium amplifying tube is standard circuit, and the intermediate frequency has been adjusted to 465KHz.4. The outer casing plastic is new material, long lasting.5. All levels of circuits have Ic test ports.6. The circuit diagram, assembly drawing, parts list and process documentation are complete.Specification:Condition: 100% Brand NewItem Type: Radio Electronic DIY KitFrequency range: 525~1605KHZOutput power: 100mW (upper limit)Speaker: 57mm, 8 0.25WPower: 3V (2 x AA batteries) (battery not included)Volume: Approx. 122 66 26mm / 4.8 x 2.6 x 1inPackage List:1 x Front Shell1 x Back Shell1 x Speaker1 x Circuit Board1 x HX108-2 Board1 x Large Disc1 x Small Disc1 x Paper Disc1 x Positive Plate1 x Negative Spring4 x 2P Capacitor7 x 3P Components4 x Tuning Plate Screw10 x 2P Ceramic Resistor13 x Resistor3 x Diode1 x Magnetic Bar5 x Screw1 x Tuning Board2 x Transformer1 x Magnetic Rod Bracket2 x Positive and Negative Wires2 x Speaker Cable1 x Potential Plate1 x Coil1 x Long Rod Spring1 x Chinese ManualNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.