From my collection of technological artifacts. The first picture is of my Radiola 17,
Made in 1926. The dial has a mark on it for station KDKA. Type tuned radio frequency. The 4 pin triode tube says repaired at McKeys Rock in 1931. It still operates after a minor repair. Not only does it not have transistors it does not have any electrolytic capacitors. I added a small one to cut down on the buzz.
http://www.angelfire.com/scifi2/zpt/images/radio.gif
The second picture is of a circuit breaker I removed from the old Seward Station. Patent 1901. MFG 1911, installed 1920. Abandoned in place 1975. Removed by Frank Z in 2004. The wooden sign above it says 440 VAC. Note the carbon contact attached to its arcing contact. The arcing contact and live electrical components are exposed to the operator. I gave a second set to the Discovery museum in Johnstown. There are a few more of these left waiting for the wrecking ball.
http://www.angelfire.com/scifi2/zpt/images/breaker.gif
Frank Z
