SFO Museum's Instagram BotMay 23, 2025
"Bakelite was the first plastic used to make radio cases, allowing for sleek, modern designs not possible with wooden construction. Invented in 1907 by Belgian-born chemist Leo Hendrik Baekeland (1863-1944) at his home laboratory in Yonkers, New York, Bakelite was the tradename for a lightweight, easily molded plastic, thermosetting phenolic resin. While the color of Bakelite was initially a translucent amber, the addition of fillers and heat in the manufacturing process changed the plastic into its characteristically opaque, dark brown color. Do you own any Bakelite? Radio is courtesy of Steve Kushman. "On the Radio" is on display, post-security, in Terminal 3. http://bit.ly/RadioSFO" This was posted to our Instagram account on April 12, 2018 – https://millsfield.sfomuseum.org/instagram/1729358359/
SFO Museum's Instagram BotMay 16, 2025
"Crystal sets received radio signals during the earliest days of broadcasting. These simple radios did not operate from batteries or household current-they relied on a semi-conductive mineral known as a crystal and simple circuitry to harness energy directly from radio waves in the air. Crystal sets required a large antenna and a good ground connection to be effective. Due to their low output, crystal sets could not power speakers and listeners wore headsets. Radio Bug courtesy of Steve Kushman "On the Radio" is on display, post-security, in Terminal 3. http://bit.ly/RadioSFO" This was posted to our Instagram account on March 21, 2018 – https://millsfield.sfomuseum.org/instagram/1729358453/
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SFO Museum's Instagram BotMay 13, 2025
"Transistors are far smaller than vacuum tubes and do not require periodic replacement. Initially too costly for most products, audio transistors found their first use in hearing aids. In 1954, Texas Instruments partnered with Industrial Development Engineering Associates (IDEA) and created the first transistorized radio. Marketed as the Regency TR-1, it featured a built-in speaker and debuted just in time for the holiday season. In 1957, Sony marketed their first pocket-sized radio, the TR-63, followed by the popular TR-510 in 1961. Japanese transistor radios were designed for the American market, and sales quickly outpaced heavier and more-expensive examples made in the United States. Do you own any transistor radios? "On the Radio" is on display, post-security, in Terminal 3. http://bit.ly/RadioSFO" This was posted to our Instagram account on June 29, 2018 – https://millsfield.sfomuseum.org/instagram/1729358039/
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spmatich vk3spm May 9, 2025
Fixing another #TransistorRadio . This one is a #NationalPanasonic 4-band #shortwave receiver from 1970. Blew a 100 ohm 1/2watt resistor in the push-pull output stage. Will replace it and see how we go…
spmatich vk3spm Apr 19, 2025
Fixed a transistor radio today, this one an “Astor Transistor 8”was made in Melbourne in 1964. I picked it up for $20 at the Vintage Market.
Here you can make out a crack in the PCB near the mounting hole. It goes right through the track on the other side of the hole near the volume control. One of the reasons it wasn’t working, in this case I bridged the cracked track and voila. #TransistorRadio #Melbourne #RepairReuseRecycle
彦八(HikoHachi)は浮世を忍ぶ仮の名です.Dec 7, 2024

2024.12.07
＜日本へ里帰りしたラジオ＞

CHANNEL MASTER
MODEL 6520

これは1963年頃に日本の三洋電機が製造してアメリカのチャンネルマスター社へOEM供給していた輸出向けラジオです。

当時は日本の電機メーカーは切磋琢磨し、良い製品を作って世界に羽ばたこうとしていた時代。航空機で例えるならは滑走路から離陸して目標高度に向かってエンジンをフルパワーで飛行していた時代の製品です。

デザインも造りも良く、手抜きやコストダウンした感じは全くありません。
そんなラジオが私の手元に届きました。

#Radio #ChannelMaster #Sanyo #サンヨー #三洋電機 #transistor-radio ##transistorradio

GeekProjects NewsSep 5, 2024
How Sony Mastered the Transistor https://hackaday.com/2024/09/04/how-sony-mastered-the-transistor/ #transistorradio #RadioHacks #history #sony
How Sony Mastered The Transistor

When you think of Sony, you probably think of a technology company that’s been around forever. However, as [Asianometry] points out, it really formed in the tough years after World War II. Th…

Hackaday
No Context PicturesJun 14, 2024

1976 Radio Shack Transistor

The image is a photograph of a vintage transistor radio with the branding "Sony Power" visible.
It features a red and black case with control knobs and buttons on the front panel, and it's placed against a neutral background.

https://nocontext.loener.nl/fullpage/07-July1976-Page-008.png

#photography #illustration #madman #nocontext #sfw #Vintageelectronics #Retrogadgets #Sonypower #Transistorradio #Oldtechnology

i4cy 📌Apr 24, 2024

This Roberts radio had an annoying intermittent buzz. So I used a signal generator to find what was resonating. It turned out to be the battery spring - hot gluing fixed it.

#VintageRadio #TransistorRadio #RetroRadio #Vintage #TechNostalgia
[17/06/2020]

i4cy 📌Apr 24, 2024

I've just serviced and repaired this two transistor Sinclair Micromatic. The World's Smallest Radio - well it probably was 50 years ago.

#Sinclair #Micromatic #VintageRadio #TransistorRadio #RetroRadio
[10/03/2020]