SHORPY Historic Photo Archive & Fine-Art Prints
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Our holdings include hundreds of glass and film negatives/transparencies that we've scanned ourselves; in addition, many other photos on this site were extracted from reference images (high-resolution tiffs) in the Library of Congress research archive. (To query the database click here.) They are adjusted, restored and reworked by your webmaster in accordance with his aesthetic sensibilities before being downsized and turned into the jpegs you see here. All of these images (including "derivative works") are protected by copyright laws of the United States and other jurisdictions and may not be sold, reproduced or otherwise used for commercial purposes without permission.

© 2018 SHORPY INC.

[REV 25-NOV-2014]

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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.

On Shorpy:
Today's Top 5

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.

SHORPY HISTORICAL PHOTO ARCHIVE | History in HD is a vintage photo archive featuring thousands of high-definition images from the 1850s to 1960s. (Available as fine-art prints from the Shorpy Archive.) The site is named after Shorpy Higginbotham, a teenage coal miner who lived 100 years ago.

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