A One-Transistor Ham Transmitter Anyone Can Build | Hackaday

What makes amateur radio attractive to many people is that it enables you to make your own gear. Temporary construction of ham usually starts with making your own antenna, but in the end, the desire to build your own radio must be eliminated. And building

It is the easiest way to enter the world of DIY broadcasting.

Of course, limiting yourself to a total of eight components requires some sacrifices, and [Kostas (SV3ORA)]'s transmitter is clearly a compromise study. For starters, it is just a transmitter, so you need to make other arrangements to have meaningful conversations. You must also learn Morse code, because the minimalist version only supports continuous wave (CW) mode, although

Used for amplitude modulation (AM) voice work.

The circuit is flexible enough to replace almost any part, and the transmitter can still work. Most parts are trash can items, although you must wind the main transformer manually. As mentioned above, the transformer not only provides feedback to the transistor oscillator, but also has windings for powering the incandescent lamp and provides taps to connect antennas of different impedances-no external tuner is required. [SV3ORA] provides detailed transformer winding instructions and shows the final construction, which looks very professional and neat. The video below shows the drilling rig in operation with a separate receiver providing sidetone. You can also choose to use one of them

Spread all over the world to verify if you want to leave.

This little launcher looks very interesting, we can try it

If we can find all the parts. To be honest, the most difficult thing is probably the variable capacitor, but

too.

[by

]

This is the answer I got from other places, and some people thought it was a good idea to repost.

We really need to end this attempt on an extremely simple basis.

Everyone should make a crystal oscillator. This is the first radio device I made. But you don't need a power source, this can be heard in your receiver.

Yes, some people like to deal with challenges simply, but they usually know how things are going. Beginners need to start simple, but these people do not have the best equipment. Nowadays, low power, CW and crystal control will become obstacles. This was the first time I used a license to operate it was intimidating, and I was using someone's Collins KWM-2.

Simplicity is never enough. Recently, someone demonstrated a circuit that "makes a coil effortlessly". However, this will result in impure output, which may be unknown to beginners. Winding the coil is part of building a simple transmitter, learn the basics and keep improving.

It is impossible for anyone to have a power transistor with radio frequency capabilities without a bunch of low-power transistors. Add a separate oscillator before the power stage is added

There is almost no complexity, but some problems get rid of.

In an emergency, the crystal will be the biggest problem, not the part that builds two transistor emitters. You will not sacrifice the ham band crystal (unless there is an analog TV that provides 3.58MHz color subcarrier crystal), and out-of-band means that it is best for a real emergency. Odd frequencies will reduce the number of people who are listening, while CW will make most people unable to understand what is being sent. Now, will the Boy Scouts still bother Morse?

Ham Radio focuses too much on "emergency communications" rather than technology. This seems to represent this. Simple rather than good. It seems that many hams have never gone beyond simplicity and found some excuses. So people were trapped in 1971, which was just a solid version of the 1920s. Back then, I found synthesizers, frequency counters and receivers with higher IF, and found amateur electronics and amateur magazines.

Ham emergency communication is about providing communication to a third party, rather than being stuck somewhere and having to build a transmitter. Carl and Jerry made spark gap transmitters at least from cars and televisions in a fictitious emergency.

You should use your crystal advantage to do something. For decades, people have only used LC tank circuits to build radios, and its transmitter and receiver have no problems. Many common low-power small-signal transistors can work at frequencies up to 100-300MHz, and power transistors with this function are rarer and more expensive. This simple 1-transistor transmitter is just an oscillator, and accidentally, it is also part of a more complex radio...

There are many ways to wind a coil. The radio can use manufactured inductors, or designers can place the inductors on the PCB itself, as in some designs done by 4SQRP. one example:

Very good Even without low-pass filtering, the harmonics are very low and very good.

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