Do you know the story of the CK722? In the 1950s, Raytheon was making tiny transistors for hearing aids to replace the pre-WW II subminiature tubes.
Aside: Those tubes, developed by Norm Krim, were ruggedized and used in the WW II Proximity Fuzes, one of THE big inventions of WW II. Anyway, Raytheon was making piles of these tiny transistors, but many were not making hearing aid specs. Norm got the idea of packaging them to sell to hams to learn about transistors. If you open up one of the blue ones, there is another tiny case inside which is the real transistor. BTW, Norm is still alive and well in his 90s. -John =============== > Anyone remember the CK722 transistor? As I remember they were about $7.50, > a > considerable sum. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
