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Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.

 
 
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VINTAGRAPH • WPA • WWII • EAT MORE FISH, 1917

Next Wave: 1920

Next Wave: 1920

        Enrollments are limited, so act now to get in on the ground floor of wireless telephony!

Washington, D.C., 1920. "National Radio School." Last seen here in an exterior view. National Photo Company Collection glass negative. View full size.

 

Knife Switch and Fuses

We have a similar knife switch and fuse arrangement on a wall in the basement of our 110-year-old house. It's no longer connected to anything, but it does give that nice "Dr. Frankenstein's Laboratory" feeling!

Good advice

In 1920 that would have been darn good advice. Hard to imagine now, but the radio boom was a bigger deal then, than the internet was in 1995. First ever development of a mass media market. It didn't "bust" until the 50s, at which point the same people could have gotten in on the TV boom.

Only Morse, no telephony.

Left to right, looks like
1/ Induction coil with adjustable spark gap at rear.
1/ Transformer with some kind of adjustable thing in the core gap?
3/ 2 volt lead-acid accumulator.
4/ Rotary spark gap for adding whiny sound to Morse code transmisions.
5/ Two inductors with ajustable coupling via hinge. Probably for adjusting the coupling of this entire transmitter-on-a-bench to an outside 500 yard long antenna.

On the architrave is a knife switch for jump-starting whoever is lying on the slab.

 
THE 100-YEAR-OLD PHOTO BLOG
Shorpy.com | History in HD is a vintage photo blog featuring thousands of high-definition images from the 1850s to 1950s. The site is named after Shorpy Higginbotham, a teenage coal miner who lived 100 years ago.

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