1945-1991: Cold War world Wiki
Advertisement

CK722 transistor and package.

The idea[]

An attempt to improve on the CK718 hearing aid transistor. It was a failure there due to not meeting the strict specifications needed for hearing aid usage, but ideal for other less demanding uses. It was the first one that was cheep enough to be sold to hobbyists in the general public.

Manufacturing[]

N\A, but probably akin to then Western practices.

Casing[]

A small oblong, painted, metal case full of epoxy resin or glass powder and with 3 wire legs at the bottom, protruding through a PVC cap at the bottom. It was initially housed in pre-a cast epoxy oblong case during it's first year of use.

Stats[]

Raytheon CK722 PNP germanium junction transistor.
Category. Statistic.
Designed in. Early 1950s.
Made in. 1953.
Transistors per chip. 1.
Power supply. Battery and low voltage power.
Still in use. No, but may are still in private hands, corporate archives and at museums.
Nationality. American.

It was one of America's first moves in to the modern electrical business and it was seen as a national icon at the time.

Also see[]

Sources[]

  1. http://www.wylie.org.uk/technology/semics/CK722.htm
  2. https://books.google.co.uk/books?id=P9wDAAAAMBAJ&pg=PA246&lpg=PA246&dq=Raytheon+CK722+PNP&source=bl&ots=eJJev1-eiw&sig=rLHH6SdZ9ectl8WvNEnDTIGLtKk&hl=en&sa=X&ved=0ahUKEwi345jii6bPAhXJJcAKHdgFCY0Q6AEIPTAE#v=onepage&q=Raytheon%20CK722%20PNP&f=false
  3. http://semiconductormuseum.com/PhotoGallery/PhotoGallery_CK722_Black.htm
  4. http://www.ck722museum.com
  5. https://smallbusiness.yahoo.com
  6. http://www.ebay.com/bhp/raytheon-transistor
  7. https://en.wikipedia.org/wiki/CK722
  8. http://www.semiconductormuseum.com/Museum_Index.htm
  9. http://books.google.com/books?id=mdwDAAAAMBAJ&pg=PA219
  10. http://www.swtpc.com/mholley/PopularElectronics/Oct1979/PE_Oct1979.htm
  11. http://semiconductormuseum.com/Museum_Index.htm
  12. http://semiconductormuseum.com/PhotoGallery/PhotoGallery_CK722_Silver.htm
  13. http://www.ck722museum.com/
  14. http://semiconductormuseum.com/PhotoGallery/PhotoGallery_CK722_Black.htm
  15. https://en.wikipedia.org/wiki/2N107
  16. http://semiconductormuseum.com/HistoricProfiles/CarlandJerry-TheNewAdventures.pdf
  17. http://semiconductormuseum.com/PhotoGallery/PhotoGallery_CK722_Blue.htm
  18. http://www.idealprice.co.uk/compare.html?q=Pnp-Transistors&ort=Pnp-Transistors-Sale&adid=iaCkp56y0aFfh9PD0aSbptXR1aRYosyfs5%2BiYLXUxJ%2BlnNTW0qOlWdSfypKnpofFy5KkcLE%3D&baa=P&utm_source=bing&utm_medium=cpc&utm_campaign=nt_P_1&utm_term=%2BPnp%20%2BTransistors&utm_content=Pnp%20Transistors
  19. https://www.reference.com/web?qsrc=999&qo=semQuery&ad=semD&o=38043&l=sem&askid=3425ea56-7062-4e2b-8dcc-3d325ad0056b-0-rf_msm&q=pnp%20transistors&dqi=Raytheon%20CK722%20PNP%20germanium%20junction%20transistor&am=modifiedbroad&an=msn_s
  20. http://www.ck722museum.com/page3.html
Advertisement