Silicon Valley used to have a museum of early radio at Foothill College, the Foothill Electronics Museum. Arc transmitters, not semiconductors. It was closed in 1991.[1] The San Jose Historical Society has the items but they are not on display.

[1] http://perhamcollection.historysanjose.org/about/

I've just checked over some photos I took during a visit to San Jose from the UK in 2015 and there was an exhibition at History Park titled "The Wireless Age - Electronics entrepreneurs before silicon valley - Selection from the Perham Collection of early electronics".

Even though it was a 'selection', there was a LOT of stuff on show back then.

http://perhamcollection.historysanjose.org/category/exhibits...

The link in the blog post to photos.google.com is now 404. Do you have a working link?

There's also https://worldradiohistory.com/ - formerly known as AmericanRadioHistory.com.

I hope it's backed up...

Edit: The site FAQ says:

https://worldradiohistory.com/American-Radio-History-FAQ.htm

"I have off-site backups at several locations under the custody of well-respected radio historians. I also have several hearing-impaired persons who help with the major flatbed and Atiz Bookscan digitizing projects. There is also cloud backup."

>Captcha

It won't let you look at the site if you're using Tor Browser. I hate it when sites do this.

Works fine for me on Tor, didn't get any captcha. Maybe its a problem with your particular relay?

Best radio museum anywhere: https://www.pavekmuseum.org/

There is another museum hosted by the Antique Wireless Association:

https://antiquewireless.org/homepage/video-tour-2/

Great video.

Where is Edwin Armstrong?

Section 14, "Expanded Audion and Vacuum-tube Development (1917-1930)" [0], including Armstrong's original paper [1].

[0] https://earlyradiohistory.us/sec014.htm

[1] https://earlyradiohistory.us/1921sup.htm