The more popular brands now are "Panda" and "Desheng". There are many models. There are also "Shanjin", "Shouyu" and so on. Prices range from tens of yuan to thousands of yuan, especially "Desheng"! Where the reception conditions are good, 80 or 80 will work well. However, in some places (especially downtown areas) there are no shortwave or even medium wave stations to receive. Only the FM band can receive a few local stations, as well as the central and provincial stations that broadcast! So be sure to choose a radio with FM band. If you have higher requirements for sound quality, you should choose a larger radio. Nowadays, plug-in radios are popular, which is very convenient for playing the music you downloaded and recording the music being played by the radio station. It is best to buy one with a voltage of 7.4 volts. The one with built-in lithium battery has better sound quality and better battery life. However, the reception performance of such machines is average, and some only have FM bands. There are fewer full-band ones, and if there are, the reception performance for medium and short ranges is just average!
Radio enthusiasts should choose models that cost more than a thousand yuan (some may not be that good). So choose carefully. You should choose an advanced model among the full wave machines with medium wave and six to eight or more short waves! Enthusiasts should choose the professional model, but the price is also higher. They cost thousands of units, or even more expensive!
Personally, I still like the red light "3T6" and "3T9" made in China forty years ago. Panda "830", Haiyan, and other first- and second-class advanced models. There are also high-end models from Japan's "Sony" in the same period, but the prices of such machines are too high. It is difficult for ordinary consumers to accept it. Most of them are heirlooms of enthusiasts!
Just listen to the news and listen to the songs. Then the radio attached to the mobile phone will be enough. For example, almost all mobile phones in the past have a radio function, and the effect is not bad. The disadvantage is that you must plug in headphones to listen (because the headphone cable is used as an antenna). Today's smartphones basically don't come with radios, but you can download and install radio software to receive Internet radio, and the sound quality is good. But I personally don’t like to play, because I don’t have that traditional feeling!
It is worth mentioning that if you live in the suburbs of a big city and have the conditions to set up an antenna as high as possible (more than eight meters) and long enough (more than twenty or thirty meters), you will receive better signals. There are many radio stations, which is very fun. There is a high-end antenna (take lightning protection measures), and you can even play with ore radio (actually no ore is used, the effect is not good. Diodes or field effect tubes are used for detection). Today's ore machine production equipment is advanced, and ordinary enthusiasts can make much better machines than we did in the 1950s! Very interesting and extremely playable!
As for how to make an advanced ore machine, I will write another article for everyone! Below are my collection of homemade radio and internet pictures for everyone to enjoy! Figure 1 is the inside of the red light "3T9". Figure 3 is a homemade nine-lamp tube high-sensitivity receiver, and Figure 4 is an internal diagram. Figure 5 shows the Panda "B-11" first-class radio in use. Others are online pictures!
Answer the comprehensive private message questions from some radio enthusiasts about homemade nine-lamp machines.
This unit is designed with six-band high sensitivity and wide frequency response. Medium wave, short wave 3.4 and FM bands are all superheterodyne. Shortwave 1.2 is super-innerdyne. The FM is a transistor mono component (there was no stereo broadcasting when I made it, so the component was installed in a metal box under the chassis). This machine uses 6k4 as the high amplifier, the 6U1 three-pole part of the mixer is short-circuited and is not used, and a decimeter wave transistor 12C3P is used as the local oscillator. The other two 6k4 are used as staggered tuning mid amplifier. 6H2 does detection, automatic noise and automatic volume control. 6N1 and 6p14 are low amplifier and power amplifier. 6E1 tuning indication, transistor rectification is used for rectification, and the local oscillator uses 200v small current to stabilize the voltage. Sensitivity 50uV, AM passband 6.5kHz. Selectivity 45db. The low amplifier passband is 30 to 15k cycles, designed to adapt to the transistor FM mid amplifier. Rated output 2w, maximum 3.8w. Although the reception index is much lower than the division-level military aircraft 2221, the actual reception performance is much better than it. In 1981, I used it in Kunming to receive Chinese-language broadcasts from Romania's Chinese station, Mongolia's Dahural Broadcasting Station, Australia, Canada and other Chinese-language broadcasts.
Not to mention the major news agencies and radio stations that everyone receives! The indicator test used the popular general-purpose high and low frequency signal generator, ultra-high frequency tube voltmeter and MF35 multimeter. The chassis uses a DB751 frequency selective level meter chassis.
I am an electronics enthusiast. In 2004, I was inspired by the promotion of "Dodge Car Radio" for remote FM reception, so I had the urge to buy the Tecsun BCL2000. In addition, the Tecsun brand was the brightest at the time, which further strengthened the confidence in purchasing.
The salary was not high back then, so I needed to save money by living frugally. In 2005, I spent 350 yuan to buy the long-awaited Tecsun BCL2000 radio. But after less than a month of use, one section of the telescopic antenna broke, and it could be easily pulled out. Half a year later, the band switch began to have poor contact, the channel selection frequency was unstable, and the digital display kept jumping. A year later, the problem of poor contact of the band switch became more serious. After finally receiving a certain radio station, the sound changed as I listened. The sound from the speaker was unpleasant and made a scratchy sound.
The quality of domestic radios is indeed a big problem. The band switch and potentiometer are key components. The materials used are very sloppy and the quality is too low!
Therefore, my suggestion is to buy a second-hand Japanese cassette player that is in better condition. I use a Sharp 6060 cassette recorder to listen to medium and short wave and FM, and I am very satisfied with the effect. The sound quality is very good and the operation feels very user-friendly.
There should be two criteria for evaluating the quality of a radio: 1. The ability to receive signals, whether the signal is coherent, fast and stable when listening to radio programs, and whether the broadcast sound broadcast by the radio is clear. ; 2. Whether the sound quality broadcast by the radio is good enough, whether the broadcast sound quality is clear and layered enough. So judging from these two standards, essentially the effects of radios that meet these two standards are not much different. But judging from the history of the brand, the technical strength of old radio manufacturers like Desheng is still good, and their radios are also very good. But as for whether it is the radio brand with the best listening effect, there is no way to make a conclusion. Because with the rapid development of digital transmission technology, each of our mobile phones is actually a mobile radio, with good sound quality and strong signal reception capabilities. From another perspective, a mobile phone with radio function is actually a mobile radio. For example, the sound quality of Apple and Huawei mobile phones is also very good, and their ability to receive broadcast signals is also strong. We cannot judge which radio has the best listening effect.
I am a radio enthusiast and I am here to answer your questions.
Bo, Panda, Elvis, Han Rongda and so on. Imported brands are represented by Sony and Eton, as well as Grundig, Panasonic, Toshiba, c.crane, Kaito, Golden Years, etc. If you don’t plan to join the ranks of enthusiasts and just plan to buy a radio to listen to programs, it is recommended to buy it. Domestic products are enough, and Tecsun Sangean is the first choice. If you have high requirements for sound, you can check out several main models of Sangean, depending on your pocket. Compared with Sangean, which is better at sound tuning, Tecsun is more stable in professional reception and its after-sales service is more reassuring. For daily use, mid-range and above products from these two brands can meet your needs.
I hope my answer can provide you with some help.
In the 1980s, Hong Kong gave me two radios. One was a Toshiba pocket radio. It was a little bigger than a matchbox and very thin. It was a full-band radio that could be put in your shirt pocket and plugged in with earplugs. Radio stations around the world know this very well.
The other one is a Sony small radio, a manual pointer full-band radio. The mast antenna is now loose, but it has been used very well, and it is very energy-saving. Two AA batteries can last several times. moon.
The question is too general. Which aspect does the effect refer to? Receiving sensitivity, good selectivity, fidelity, output power, longevity, or stability? It can be seen that the person who asked the question does not understand radio at all.
I recommend an old-fashioned radio, which is the Panda brand 9-light vacuum tube dual-channel radio produced by Nanjing Radio Factory in 1958. The dual channel mentioned at that time is what we think of as dual channel now. However, there was no such thing as stereo at that time, so this dual channel is a high-fidelity power amplifier that amplifies and outputs high and low sounds separately. This radio is said to be for the National Day that year. As a gift, I actually compared the drawings of the "Netherlands Philips 9-lamp vacuum tube dual-channel radio" and found that it is the same type of product. It was confirmed that it was a reference to imitating similar products from Philips. Philips uses European model tubes. They are named after EF and ECC, and Panda brand products use Soviet-style tubes or products from Nanjing Electronic Tube Factory in China. I remember that the frequency converter tube is 6UI, the mid-amplifier is 6K4, the voltage amplification is 6N2, and the treble amplifier and bass amplifier are 6P14, the treble and bass crossover point is 1000Hz, and there are two large digital output transformers, especially the output transformer of the low-frequency channel is very large, which ensures the ability to dive into the lower limit of low frequency. This machine is a National Day gift, so the frequency points are divided A very detailed test was conducted and published in a radio magazine that year. At that time, it was claimed that this high-end radio had caught up with the quality of similar products from Philips of the Netherlands. In fact, this statement was flawed. We know the ultimate quality of the radio. Sound-producing devices – Yang speakers have not been able to produce products as good as developed European countries from the beginning of the last century until now. This has always been a shortcoming, unless the Panda radio is equipped with speakers made in Denmark, Germany, the Netherlands or the United Kingdom. At that time, The best speakers in China are the Nanjing brand produced in Nanjing, the Feile brand produced in Shanghai, and the speaker whose name I have forgotten produced by Qinghai Xining Radio Factory No. 2. Despite this, at the time, this high-end radio was considered the top radio produced in China. The price was more than 400 yuan, which was my 30 months salary at that time. According to the current price ratio, it might be a 100,000 yuan item, right? In an era when everyone was extremely poor, the only option was to climb on the counter of the Wujiajiaodian store to listen to the orchestral music being played. Every day after get off work, I would climb on the counter and listen. The salespersons all knew me and never turned off my phone. At that time, I secretly made up my mind to install one myself. Later, I installed radios from 5 lamps all the way up until I installed a 16-lamp dual-channel stereo dual Williamson and super-linear amplifier with radio function. At that time, it was 1980, and there was no concept of stereo in society. How did I come up with this? This is the result of what I read about the development and future of stereo in foreign materials. Combined with my familiarity with Williamson and superlinear amplifiers, I realized a stereo device that has not yet appeared in society, but there are no stereo sources and audio-visual products. It’s all in vain. If you get too ahead of yourself, you will fail, lose your confidence, and finally wash your hands. What I am best at is winding high-fidelity layered segmented output transformers, which is difficult and inefficient. Why am I so impressed by the Panda brand 9-light vacuum tube dual-channel radio? Because it is my country's first high-fidelity dual-channel radio. Concept It was very advanced. When playing music on a record player, it was also the most beautiful device at the time. I wonder if there are any collectors now?
History
When radio broadcasting was popular in the 1980s and 1990s, there were many radio manufacturers in China. Common ones were Panda, Desheng, Philips, Dejin, and Jinye. , Langqin, Newman, Shengbao, Sanyo, Anjian, etc. After many years, rich multimedia display forms have made radios facing elimination, and the only common usage scenarios are in taxis.
Desheng
As the traditional radio market shrinks, more and more old radio manufacturers have closed down or transformed, but there is one brand that remains unchanged and persists in its persistence. , it is virtue. Although the radio market has become smaller, it is not gone. Maybe you haven't heard of such a group, radio enthusiasts. In the early days, they mainly focused on DIY mineral radios, and later developed into a branch among audiophiles. In their minds, although the clarity of music transmitted through radio waves is not as good as that of online audio on the Internet, its unique analog flavor makes people want to stop playing it. It is like a veteran playing with vinyl. Real, delicate, and soft human voices are the ultimate pursuit.
Desheng Radio is not just about producing sound and audio products. After all, if a company wants to survive, it must sell goods. With the radio as the starting point, it radiates to peripheral equipment. At present, it has developed and produced headphones, speakers, Amplifiers, Walkmans, etc., but all focus on analog tone calibration, and the users are also radio enthusiasts. When we are at a professional HiFi audio exhibition, you will find that Desheng also brings its own products to the exhibition, and you will have an indescribable feeling. The product price is not high, and the sound quality can only meet the high-fidelity requirements, but you will always be awe-inspiring about it. respect.
If you choose a radio with better sound quality now, as a non-radio enthusiast, I still recommend Desheng radios. They have a rich product line, have product designs for different users, and can follow the product descriptions of the HiFi circle. Both have good performances in terms of musicality. The key is that the price is quite reasonable. I have heard of Tecsun's headphones, which cost a few hundred yuan, but the workmanship and sound quality are up to expectations.
I really like radios and other imported electrical appliances before the 1980s.
Once I was watching TV, and there was a story about radio enthusiasts, holding radios in their hands and shaking them back and forth towards the sky. After a while, the old man holding the radio spoke, and he put the pilot in front of the ground personnel. The conversation was all coming out from the radio,
This shows that the reception effect of this radio should be very good.
I now have a second-hand Sony radio in my hand. The reception effect should be average, but the sound quality is great. It is made in China, but I have never seen it on the Chinese market. It looks very beautiful and has no External speakers can only be listened to with headphones, I like it very much!
Every brand has its own flagship product.
The quality of radios should be evaluated across the country on the basis of the same price range. Five price ranges can be set. ①10O yuan-2OO yuan. ②2oo-400 yuan. ③40O-600 yuan ④600-8O0 yuan. ⑤80O-10O0 yuan, ⑥1000-2000 yuan, ⑦3oOO yuan or more.
The domestic radio competition consists of mass voting, expert evaluation and sales volume, which are the factors for winning the championship.
Desheng! I am a fan of radio ashes
I hope my opinions are helpful to you