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The range of ham radio communications ranges from zero to unlimited. At the longer range of the scale, some hams direct there signal at the moon, where it's reflected back and received back on Earth. That's a round-trip distance of about 477,000 miles or 768,000 km. Communication over longer distances would be possible, but as far as I know there's nothing ...


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The range of amateur radio SSB over HF "shortwave" can be between a few meters to over 20000 kilometers, depending on frequency band, transmit power, antenna type/height/polarization/aim, solar weather (including sunspot cycle, solar flares, etc.), other ionospheric conditions, time of day, local RF noise floor (including your household electronics)...


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The frequencies in your pasted image of a table are in kilohertz (kHz). These days frequencies are more often expressed in megahertz or gigahertz (MHz or GHz). Anyway, frequencies ranging from 3560 kHz, also known as 3.56 MHz, to 15.245 MHz are in the high-frequency (HF) band, also commonly called "shortwave", rather than the very-high-frequency (...


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It is not generally feasible to detect "anything". The problem is there's always something, even if it is just noise. To know if something is signal or just noise you need to know something about the signal, but when you want to detect "anything" this means you must enumerate every kind of signal that could exist, which is of course not ...


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Here's an example of an inexpensive unit that might meet your requirements: The receiver module, on the right, has part number XD-RF-5V. According to several internet searches for "XD-RF-5V datasheet," the system uses Amplitude Shift Keying - ASK. Inasmuch as the modules are intended for connection to an Arduino or other digital means for decoding,...


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my Tecsun PL-660 hadn’t been used for a while. It didn’t charge the batteries either. I put the batteries in a separate charger and brought them up to full charge. Still no joy with them in the radio. Occasionally the display came on but not clearly and with various segments missing. Over the course of a few weeks and after a little research I removed the ....


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I signed up here just to reply to this great (the only one I could find on the internet) question/experience that helped me with an identical problem. I was so close to giving up when I read this thread and went to examine the component that looks like a coin battery (as the original poster described) and having owned a sucking hakko soldering gun, i ...


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