S-Class Forty-9er telegraph kit CW transceiver 3W shortwave radio 7.023M | Электроника

1. Introduction    This is a very small volume of the 40 meter band simple micro-power amplitude telegraph transceiver, a 12V DC power supply, the spread better, they can and nearby provinces, hundreds of kilometers of amateur radio communication.    "S-Forty-9er" LXQQFY.com launched by the principle reference to the US NorCal QRP Club famous "Forty-9er" kit, support WIFI module can be configured to monitor data communication with the mobile phone APP added automatic key function, automatic transmitter function display transmitter timing, and design a housing assembly, excellent performance, nice, convenient and practical. 2, the main indicators    Power: 12V (recommended linear battery or power supply)    Antenna: 50 ohm, unbalanced    Receiving Quiescent Current: 20mA    Emission current: 400mA    Transmitting power: 3W    Frequency: The oscillator frequency emission: 7023KHz; receiving local oscillator frequency: about 7023-7026KHz    Mode: CW    Key: manual key and automatic key Automatic Identification    Automatic transmitter: Support    Configuration: Mobile APP using WIFI communication (comes hot)    Shell: assembly, all-inclusive 3, the circuit schematic    Referring schematic drawings, is a core part of the receiving NE602, which includes an internal oscillator circuit and a balanced mixer, the incoming signal through the antenna after a crystal filter, into the mixer, the oscillator circuit in the reception frequency oscillation, after mixing the two signals, the audio directly to the audio frequency signal CW, NE602 output again to the LM386 amplification, thus completing the entire receiving process. Therefore, direct RF signal is mixed into the audio receiver is called "DC receiver", DC direct conversion means. Audio oscillator circuit generating sine Q4 constitute sidetone of approximately 700Hz, gave LM386 amplification, so that the headset follow-ahead to produce "Didi blah" audio. Emitting portion utilizes the oscillation circuit NE602, and then to do the buffer amplifier Q6, the final stage is Class C amplifier constituted by the D882, the amplified high-frequency signal after LPF filter connected antenna.    Phone WIFI module is an optional module of the suite, if you do not need to use the module shorted JP1, the S-Forty-9er Forty-9er with the same function, only to become an ordinary radio support manual key. If you use this module you need to disconnect JP1 (attention required), the S-Forty-9er through WIFI APP communication with the phone, the radio's built-in configuration code to support automatic key to display the transmitter timing. 4, component selection    8050 magnification selection around 130, D882 magnification select 200 or so. L3 is a high frequency choke, using the 0.5 mm enameled wire around the 11 laps FT37-43 ferrite bead (black) on. L2 is a high frequency filter inductor, using 0.5 mm enameled wire around the 16 laps T37-2 toroid core of iron (red) on.    100uH inductors are fixed as color ring inductance, 100mH inductor cylinder fixed inductor (Outsourcing black heat shrink tubing). Other devices such as 0.47uF capacitance monolithic capacitors, larger than 10uF capacitance of aluminum electrolytic capacitors, all resistance is 1 / 4W fixed resistors. 5, production 5.1, referring to the original list, an inventory of the original device. Ready electric iron, solder, a multimeter and other tools. In the height of the welding device from low to high order, intended to build order: Resistors -> Diodes -> capacitor -> transistor -> Crystal -> bridge rectifier -> Electrolytic capacitor -> Chipset -> inductor -> magnet -> D882 -> other devices. S-Forty-9er is a new CW kit (reference time February 27, 2016), visit www.lxqqfy.com for the latest information. Note: Use WIFI module case must disconnect JP1 (unplug the jumpers) S-Forty-9er has the following characteristics: 1, the standard transparent shell. 2, should be widely Hello everyone requested, change the vertical resistors, diodes vertical, horizontal resistance, horizontal diode (down welding), the device is easy to solve the vertical short-circuit problem. 3, a high-end potentiometer to adjust the beat frequency is no longer necessary tools, direct manual adjustment. 4, increase the WIFI module supports, as an option, without the use of WIFI module, the functional equivalent of the old "Forty-9er" radio. 5, the case of using WIFI module, the internal support groups automatically launch code, the presence of radio stations, a key launch. 6, the lower case using WIFI module, support for automatic key and manual key intelligent switching and provide fully automatic mode, semi-automatic mode two operating modes. 7, the case of using WIFI module case, you can connect the phone (mobile application downloaded from www.lxqqfy.com), configuration parameters through the phone. 8, the mobile application can identify the station transmitting the content code, respectively, timing, Morse code, the letters displayed in three ways, the equivalent of transmitters to learn the function.