Author: Dai Zhongqun
Radio electronics enthusiasts are very diligent and studious, persevering, and always do everything possible to overcome difficulties and reach the other side of the ideal under difficult conditions for their own pursuits and hobbies.
Please take a look at the stories told by a few radio electronics enthusiasts in the comment section of the article I wrote, although they are all small things, you can see that these enthusiasts are talented and have made outstanding contributions.
A radio electronics enthusiast said: Maybe it's six or five years.
In that year, in order to assemble a single-tube radio, there was no money to buy a magnetic rod, and it was difficult to buy it even if there was money at that time, so I made a magnetic rod by filling it with iron powder in a paper tube.
As a result, I also received a lot of radio programs, but I didn't expect it!(voiceover: because it is simple, it is commendable!)
Another radio electronics enthusiast said: When assembling tube radios and semiconductor radios that year, all the power and output transformers were wound by themselves.
Single-ended push-pull, around dozens of them, keep trying, most of them can be used (voiceover: haha! This is a small "transformer factory" where I am the "factory director"!)
A radio electronics enthusiast described it this way: I also installed an ore radio in the fifties.
It is a natural copper ore bought from a Chinese medicine shop, with a thick enameled wire, made into a spring-like shape, one end is cut into a sharp shape with a knife, it and the ore are connected to the line, put on headphones, and the tip of the enameled wire tries to contact the ore.
There will always be a point that works well, and there is no end to the fun. (Voiceover: The most primitive ore radio, "pure natural and environmentally friendly"!)
Another radio electronics enthusiast said: When I was in high school, I learned the principles of radio in physics class.
So, I came up with the idea of assembling my own superheterodyne semiconductor radio. It took a long time to buy all the materials, but I couldn't buy ferric chloride,
There was no way, so I used hydrochloric acid and old broken iron mesh for chemical reaction, and finally succeeded. (Voiceover: See!, amateur chemical engineer.) ）
Another friend talked about "making" headphones: the lid of the ink cartridge was opened, and a thin iron sheet cut out of the canning box was used as a vibrating sheet.
Use the square magnet on the toy motor to make two money ring frames, wrap the two wire frames with enameled money with a diameter of 0.05, and then make a U-shaped frame, insert one on one side of the coil, put the magnet in the middle, connect the heaven and earth wire, and connect a 2AP9 diode in series.
I was thirteen years old!)
Let's look at how this hobbyist made a "radio chatterbox": I was also a radio amateur, and in the 70s, they all had cable broadcast speakers, but I didn't have them at home, so I found an iron box with shoe polish.
Use a plastic ruler and a canned food box iron sheet to make a skeleton, wrap dozens of circles of enameled wire, add a magnet, and a thin piece of iron, put it into the shoe polish box, cover it with an awl to drill a few holes, connect the radio line to make a sound, but the sound is not loud, I can only put it on the pillow and lie there to listen, this is the first work in my life, unforgettable. (Voiceover: The brand name of the chatter box is "pillow audio"!).
There was a radio amateur, in 1970, he assembled a 500 multimeter by himself.
It's been in use for 50 years and it's still in use. When assembling this multimeter, there were two carbon film resistors that did not meet the required resistance, so the carbon film was scraped with a knife and the carbon film was painted with a pencil to successfully meet the two resistances.
The knife scrapes the carbon film to increase the resistance, and the pencil applies the carbon film to reduce the resistance. (Voiceover: Haha! There is really a way to solve the urgent need!)
Thank you to these radio enthusiasts who have provided their own stories of personal experience!
Friends, what are your touching stories, tell them and share them with you. Thank you!
January 27, 2024