Assembled S-Forty-9er 3W HAM Radio QRP Kit CW Shortwave Radio Transmit with WIFI

Description

Description
Features:
1. Introduction This is a very small volume of simple 40 meter band micro-power amplitude telegraph transceiver,
Despite it's small size and DC receiver limitations, it is capable of working several hundred miles when connected to a good 40
meter antenna. The original design from the United States NoCal QRP club’s famous”Forty-9er” suite. The new name is "S-Forty-
9er", Designed by “LXQQFY.com”. The new product adds the following new features. Provide the WIFI module, with the mobile phone
application communication. support automatic key. Provide automatic sending function.Display sending sequential. Provide acrylic
case.
2. Specifications
Power supply: 12 Volts DC, >500mA (Recommend the use of batteries)
Antenna: 50ohm,7MHz,is not balanced
Receive: static current 20mA
Transmission power: 3W
Frequency: launch the vibration frequency,7023 KHZ
Receives the local oscillator frequency: about
7023-7023 KHZ work mode: the CW
KEY: Manual and automatic auto-detection
Automatic sending: ok
Config: the mobile phone application(WIFI)
case: acrylic
3. Circuit principle Reference schematic diagram.Receiving part is the core of a NE602,inside it includes an oscillating circuit
and a balanced mixer,antenna in the signal after a crystal filter,into the mixer,oscillation circuit at the receiving frequency
oscillation,two signals through mixing,directly put the CW signal frequency conversion for audio,NE602 output again gave LM386
audio amplifier,thus complete the receiving process.Circuit consisting of Q4 audio oscillator to produce about 700 hz sine wave
side tone,LM386 amplification,make the headset with”di tick”audio transmission.Launch part using the NE602 oscillation
circuit,and then to Q6 do the buffer amplifier,at the end of the class is made up of class C D882 amplifier,after amplification of
the high frequency signal after LPF filter ing antenna. The WIFI module is optional. If you do not use the WIFI module, you need to
short circuit the JP1，then “S-Forty-9er” == “Forty-9er” == Ordinary CW radio. If you use the WIFI module, you need to unplug
the JP1,then you can use the mobile phone configuration data. 4. Component selection 8050 magnification is about 130 , D882
magnification is about 200. L3 is HFC, ferrite beads in FT37-43 (black) to use the 0.5mm enameled wire around 11 times。L4 is the
high frequency filter inductance in T37-2 on the iron core is circular and(red) using 16 to 0.5 mm enameled wire around. Inductance
is a fixed inductance (outsourcing black heat shrinkable casing).Other devices,such as 0.47 uf formonolithic capacitors,more than
10 uf capacitance for aluminum electrolytic capacitors,all resistance is a quarter w fixed resistance.
5. Production process
5.1 According to the list of components, check the number of components. Have tools, Electric iron, Solder wire, and A multimeter
on hand. Take welding from low to high order, Recommend: Resistance -> Diode -> Capacitance -> Triode -> Crystal oscillator ->
Bridge rectifier -> Electrolytic capacitor -> Ic -> Inductor -> Magnet ring -> D882 -> Other.
Package Contents :
1 x Assembled S-Forty-9er 3W HAM Radio QRP Kit CW Shortwave Radio Transmit with WIFI
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