Early Westinghouse "Aeriotron" WD-11 Vacuum Tube
Introduced in 1922, This Aeriotron WD-11 Vacuum Tube manufactured by Westinghouse was one of the first tubes used in home radio receivers.
In 1923 the WD-11 was supplied to RCA for use in receivers and the name was changed to Radiotron.
The WD-11 was offered for general sale over the counter in 1923.
CAUTION: The 1.5 Volt filament can be easily damaged by testing with an OHM meter. Larger Photo
Not For Sale
Raytheon CK722 Transistor
Introduced in 1953, The Raytheon CK722 was the first commercially available transistor available over the counter for hobbyists and experimenters.
It was an instant success spurring the creation of hundreds of kits and a large number of CK722 circuits over the next several years.
The 611 date code represents week 11, 1956. Larger CK722 Photo CK722 Package (inside)
Not For Sale