Portable radios are generally the most versatile products. They are all reasonably priced, between $100 and $150, have good sound quality and frequency coverage, and are still portable.
1. Tecsun PL660
Tecsun PL660 radio is one of the very popular and easy to buy radios everywhere. Its design is simple and easy to use, but it's packed with features that will delight even the most experienced radio enthusiast. Here are some advantages of this aircraft:
① It has shortwave (covering the range 1711-29999KHz), medium wave, FM, longwave and aviation bands.
②Can receive single sideband signals.
③It has 2000 pre-stored frequency addresses, allowing you to easily store your favorite frequencies.
④ Has clock and alarm functions.
⑤Has a synchronous detection function (the sidebandsupper and lower can be switched).
⑥With digital display.
⑦Can be powered by batteries (with built-in charger and AC adapter).
⑧Good portability.
⑨At the time of publishing this article, the overall rating on Amazon.com was 4 stars (out of 5 stars).
2. Sony ICF-SW7600GR
Sony is a world-renowned and trusted company, and it is also well-known in the field of amateur radio. The ICF-SW7600GR is one of the company's most popular portable shortwave radios. Not a big name, to be precise, but a quality product. Here are some of its advantages:
① It has medium wave, frequency modulation and shortwave bands (150-29999KHz).
② It has 100 pre-stored frequency addresses, making it easy to store your favorite radio stations.
③With digital display - Note: This machine hastwo versions: analog and digital - make sure to buy the version with digital display.
④Can receive single sideband signals.
⑤Synchronous detection function with optional sidebands (helps reduce attenuation distortion and interference between adjacent frequency signals).
⑥The overall rating of this machine on Amazon is 4.1 stars (out of 5 stars).
● Pocket radio ($40 to $80)
If you're on a budget or looking for a pocket radio that can easily fit in a glove compartment or a pocket, the following two pocket radios are good choices.
3. Tecsun PL380
For cash-strapped radio enthusiasts, the Tecsun PL380 radio is a good choice. It's very portable due to its small size, but it still offers decent sound quality and frequency coverage. At less than $50, this radio is a great buy. Here are its advantages:
①Has medium wave, FM, long wave and short wave.
② Built-in DSP chip.
③With digital display.
④ 550 radio frequencies can be pre-stored.
⑤ The bandwidth of medium and short wave can be switched between 1, 2, 3, 4 and 6 KHz.
⑥The overall rating of this machine on Amazon is 4.2 stars (out of 5 stars).
4. Kaito KA600
If you are looking for ultimate portability, you may want to consider the Kaito KA600 radio. This innovative radio has 5 different power modes, making it an essential for survival trials. The hand crank generator handle looks great because you can use it to power the radio in the event of a power outage, even when there is no light. By turning manually for 5 minutes, the radio can broadcast a program for approximately 45 minutes. Here are its advantages:
① 5 power modes - AC/DC power adapter, AA battery, USB power supply, ahand crank power supply and solar power supply.
②Has mediumwave, FM, longwave, shortwave and NOAA weather bands.
③With digital display.
④ It has scheduled power on and off functions.
⑤ There are 4 frequency setting methods: direct frequency input, manual setting, ATS (automatic frequency search and storage), and stored frequency search.
⑥The solar panel is adjustable and has built-in reading lights, flashlights, thermometers and hygrometers.
⑦ Very light and compact - perfect to carry.
⑧The overall rating of this machine on Amazon is 4.3 stars (out of 5 stars).
The problem of placing solar panels on the radio.
Material reasons.
Because the first commercial product based on semiconductor transistors was the solid-state radio.
When radios appearedfor the first time, they used vacuum tubes. Later, semiconductor transistors appeared, and the first product made from semiconductors was radios, so semiconductors became the name solid-state radios.
This is also about distinguishing between vacuum tube radios and solid state radios.
Now the development of semiconductors has been able to adapt to our lives. Including TVs, solar energy and semiconductors, which can be used to measure temperature, it can reach 70% of the fields of production, life, medicine and health, research and science education, etc.
Classification of semiconductors: integrated circuits, discrete devices, optoelectronic semiconductors, logic integrated circuits, analog integrated circuits, memories, etc. Additionally, there are classif methodsication based on the signals they process, which can be divided into analog, digital, analog-digital hybrid, and function.
The radio must use a stable voltage for power supply. The voltage of your solar panel is not constant and is pretty much a constant current source, so it cannot be used directly.
If you want to use it, you must useA power conversion module can convert it into a constant voltage output.
The short circuit current is only about 1 mA, which is definitely not enough. Remember that the voltage is already zero at this point, what else can be provided?
To be honest, the calculator's solar panel is too small. You'd better buy one with an area of more than 6 square centimeters