Frogs Suite Ultimate V3 Version CW Transceiver Electromechanical Telegraph Machine Shortwave Radio Stations 7.023

Frogs Suite Ultimate V3 Version CW Transceiver Electromechanical Telegraph Machine Shortwave Radio Stations 7.023

Product information:
- Key interface, right channel to impending, compatible with key interfaces.
- Increase the power indicator light, is advantageous for the failure of judgment in a timely manner.
- Isolate the switch structure change, eliminate launch receiving "kaka" the impact of the noise, at the same time, solved the high frequency switch is easy to suffer damage, and the problem is not easy to buy, convenient solutions are put forward.
- Power supply interface and antenna interfaces using a higher cost, relatively simple white 2.54 interface is more durable, preventing the interface leak copper to make circuit board burned.
- Article 5, two increase grounding circuit board, is easier to debug with shell.
- Optimization of transmission circuit, improve transmission power to 3 w, 12 v power supply).
- Finished board without shell

Brief introduction:  
This is a very small volume of 40 meters micropower continuous transceiver telegram, use the 9 v battery power supply. Can spread in good time, and hundreds of kilometers in nearby provinces of amateur radio communication.
 
Specification:     
- Power supply: dc 9 v - 14 v
- Antenna: 50 ohms, not balanced
- Receive the static current: 12 ma @ 9 v
- Transmission power: 12 v / 3 w, 9 v / 2 w
- Vibration frequency range: launch the 7.023 MHz, receives the vibration, 7.023 to 7.026 MHz (7.023 MHz crystal vibration)
- Working pattern: the CW
- PCB board: 77*70 mm (needs aluminum shell: 83*32*70mm)

Circuit principle:
The core of eceiving part is NE602, antenna signal coming in after a crystal filter and attenuation potentiometer, into the mixer, on the receive frequency oscillation oscillation circuit, two signals after mixing, will directly report to the SSB/the CW signal converter for audio, NE602 output again gave LM386 audio amplifier, this completes the process. So using the rf signals directly mixing into audio receiver to be called "DC receiver".
Launch part using the NE602 oscillation circuit, then in 9018 made the buffer amplifier, 9018 as the launch button, also control the transceiver circuit and signal switch, at the end of the class is composed of C D882 amplifier, after amplification, the antenna after LPF filter high frequency signals.
Component selection
Magnification selection around 130, 9018 D882 magnification selection around 200. L4 is HFC in FT37-43 (the circular) American ferrite beads of enameled wire (black) to use the 0.51 mm round 11, about 20 cm (also can be used to sell fixed inductance instead of on the market), the inductance at about 20 uh. L5 is high frequency filter inductance in T37-2 (the circular) American iron powder core magnetic ring (red) to use the 0.51 mm wire or cable around 16, about 25 cm, inductance at about 1 uh. Other inductance: 1 mh is fixed color ring inductance, 100 mh inductance for cylinder fixed inductance, outsourcing black heat shrinkable casing. All pf capacitor for high-frequency ceramics, less than 1000 0.47 uF capacitance for monolithic capacitor, is greater than 1 uF capacitance of aluminum electrolytic capacitors, all resistance is a quarter w 5% fixed resistance.

Usage:
Because this machine is a simple direct frequency transceiver, anti-interference, selective cannot compared with superheterodyne receiver, so must use not bad Yu Quanchang half wave dipole antenna, otherwise the communication effect is poorer. Choose less interference, good opportunity to communicate experiment, had better make an appointment with friends. Communication distance more secured, in 150-300 km distance from main more see propagation environment and the operator's skills. If radio interference is bigger, need 5 k GAIN potentiometer attenuation signal, can dash forward show from radio interference signal. The attenuation potentiometer is key, carefully adjust, will receive unexpected results.  
 
Package included:
- 1 x Transceiver board (without shell)