Details on assembling this AM radio kit that’s mostly in Chinese. Note that “http:” is not secure so it might need https: instead. http://www.radioboatanchorblog.com/blog/hx-6b-chinese-radio-kit-build?fbclid=IwY2xjawLcfHdleHRuA2FlbQIxMQABHkIPEJW7iGvqm7ooztFySxe38gLI2guH4ymbV-sXwPbOoqyIxvYFQxL0J5j4_aem_Msqfjb36T0JDEY92jt3izQ
Archive for the ‘AM Band’ Category:
2025-07-08 Full Restoration Of Old AM Transistor Radio
This is hard to believe. It’s a lot of work to do on a cheap AM radio. But it gives me a lot of ideas. I wonder how many hours it took to do this, we see it happening in nust a few minutes. https://www.facebook.com/restorationpretty/videos/591611740013679/?mibextid=9drbnH&s=yWDuG2&fs=e
2025-07-08 In 1929 The Superheterodyne Radios Made TRF Radios Obsolete
In the 1920s the TRF – tuned radio frequency – radios were hard to tune and their performance wasn’t very good. In 1929 the radio manufacturers started selling superheterodyne radios that had only one tuning knob, not several like the TRFs had. No more fiddling around with knobs to try to get good reception. Plus
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2024-08-31 AM Transmitter, Low Power
This is an AM transmitter that this guy built. He says it’s rich in harmonics – it has no tuning nor low pass filtering and the stages are class C, no forward bias. It should have all the things used to minimize harmonics, like a low pass filter. Class C operation is used to maximize
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2023-11-06 Reproduction Antique Radio Tubes and sets
I’ve been discussing the restoration of a hundred y.o. radio, and I thought about the retro light bulbs that look like incandescents but use LED filaments. Someone should make some old tubes that are actually using LEDs that look like the filaments, but just for decorative purposes. The glass envelope would look like the tube;
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2022-03-12 Homemade Adjustable Capacitor
Homemade Adjustable Capacitor I read that the 365 pF air variable capacitors are very expensive, $30 or more so I decided to try to build one. It’s not difficult to make an adjustable capacitor out of materials one may have at home. This one does not adjust easily, it’s more of a prototype. I got
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2021-01-03 Santa Ana Radio History ++
One radio station they document is KWIZ. http://www.santaanahistory.com/articles/earlyradio.html
2020-10-15 AM & Digital Radio Mondiale
Well, this article wants the Flunked Clown College to let DRM be one of the choices. It doesn’t matter to me because I don’t plan on spending anything on getting a device that will decode HD radio, FM or AM. Even if the next car I buy has it, I will still not be using
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2020-03-29 AM Osc + Modulation + Buffer
This is from Electronics Illustrated Projects 1968. It shows crystal sockets, but instead a RF coil may be used and its value will be about 220 microhenrys. And C1 and C2 will have to be changed to bring the frequency down to the AM band. The germanium transistors are no longer available so silicon transistors
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2020-03-10 Simple AM Band Antenna Tuning Coil 240 Microhenrys
The standard ferrite antenna loopstick for a 365 pF tuning capacitor has an inductance of about 230 microhenrys. This in combination with the tuning capacitor tunes across the full AM broadcast band. It’s useful to be able to wind your own inductor so it can be used for an antenna coil, a trap to attenuate
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