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[(350686)kit Without shell]![](https://ae01.alicdn.com/kf/S07fe0d7eb6cf41afa405977ed403a80aN/-.jpg_640x640.jpg)
The original design came from the famous "Forty-9er" kit of the NoCal QRP club in the United States, and was localized by domestic enthusiasts. This machine has a large number of users.
The new "Forty-9er" kit has the following features:
1. The output power is increased to 3W, and the power output adopts American magnetic ring, which makes it have strong long-distance communication ability and improves the practicability of Forty-9er!
2. Add a sidetone circuit, so that when you operate the transmitter, the earphone can also monitor the signal sent by the shot. The sidetone circuit adopts an audio sine wave generator, and the sense of hearing is obviously better than the effect of the ordinary frog square wave generator.
3. The PCB board of this kit can be easily put into the standard aluminum profile shell of 65mm*35mm*100mm, the kit does not include this shell, please contact us if you need it
4. The local oscillator frequency of this kit is fixed at 7.023MHz when transmitting, and the local oscillator frequency is 7.023-7.026MHz when receiving.
PCB size is 6cm*6cm.
![](https://img.alicdn.com/imgextra/i4/10344512/TB2jMrobXXXXXagXXXXXXXXXXXX_!!10344512.jpg)
main indicators
Power supply: 12V
Receive quiescent current: 23mA @ 12V
Emission current: 450mA @ 12V
Transmit power: 3W @ 12V
Frequency range: transmit local oscillator 7.023MHz, receive local oscillator 7.023-7.026MHz
Working mode: CW
circuit principle
The receiving part is a typical NE602 plus LM386 direct conversion receiver.
The transmitting part uses the oscillator circuit of NE602, and then uses 8050 for buffer amplification, 8050 is also used as transmit keying, the final stage D882 is a class C amplifier, and then sends LPF and then connects to the antenna. There is sidetone when transmitting.
Kit Description
This kit is not soldered, and the delivery is full of scattered electronic components. The pictures of the finished products displayed in this store are only for reference when purchasing.
![](https://img.alicdn.com/imgextra/i1/10344512/TB2G1HXbXXXXXamXXXXXXXXXXXX_!!10344512.jpg)
![](https://img.alicdn.com/imgextra/i2/10344512/TB2NW2bbXXXXXXOXXXXXXXXXXXX_!!10344512.jpg)
Since NE602 no longer produces discrete DIP8 packages, the current kits are all equipped with SMD 602 in SOP8 packages.
Please use a pointed soldering iron when soldering. If necessary, you can leave a message to help you solder the 602 and send it again.
![](https://img.alicdn.com/imgextra/i3/10344512/O1CN01CX5RJi1jCXlshkEgf_!!10344512.jpg)
![](https://img.alicdn.com/imgextra/i4/10344512/O1CN01jeilWG1jCXls1chtn_!!10344512.jpg)
Back of PCB
![](https://img.alicdn.com/imgextra/i3/10344512/O1CN01o8kuBg1jCXlpO0KwG_!!10344512.jpg)
![](https://img.alicdn.com/imgextra/i3/10344512/TB2j.nHfXXXXXa7XpXXXXXXXXXX-10344512.jpg)
FAQ
Q: How far can it be transmitted?
Short-wave communication is related to several factors such as the propagation environment, antenna, equipment, and operation level. It is difficult to ensure a specific distance only by equipment. All the kits in our store are classic models, which are used by a large number of people at home and abroad. There are also customers in our store with very good transmission performance. The basic premise is to use a good antenna!
Q: Can the telegraph be intercom?
CW transceivers cannot intercom. Only machines that support modulation methods such as SSB or FM can intercom. The transceivers can only use keys to send messages and earphones to receive messages.
Q: Do I need to buy electric keys?
For beginners, amateur production is expensive in DIY. It is not recommended that you buy expensive electric keys. It is recommended to make your own. Find an old mouse + MP3 headphone cable and modify it yourself.
Q: What kind of antenna do you use?
It is recommended to use a dipole antenna or an inverted V antenna, please refer to Baidu "Shortwave Dipole Antenna" for details.