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Kt315b

Some Soviet KT315b transistors.

Mullard OC170

A OC170 germanium PNP alloy junction transistor in TO1 metal case. These were a common transistor in the 1960s for RF and IF stages. This package is noted for a fourth 'shield' connection to the case. These transistors are now decades old and most have failed from the formation of internal metal crystalisation known as 'whiskers' that cause short circuits.

Sylvania 2N34 Transistor

An early 1950s transistor using the precursor to the EIA/JEDEC part numbering system.

Transistors - The Invention That Changed The World

Transistors - The Invention That Changed The World

Transistors - The Invention That Changed The World. Thank you to my patreon supporters: Adam Flohr, darth patron, Zoltan Gramantik, Josh Levent, Henning Basma, Mark Govea Patreon: https://www.patreon.com/user?u=2825050&ty=h Facebook: http://facebook.com/realengineering1 Instagram: https://www.instagram.com/real.engineering https://www.instagram.com/brianjamesmcmanus Twitter: https://twitter.com/Fiosracht Music: Outro Music is The Catch by Maeson: https://soundcloud.com/maeson-1/tracks https://twitter.com/Maesonprod Intro Music: "Infinite Perspective" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License Transistor Zoom: http://www.nisenet.org/catalog/media/zoom_microchip_video


  1. Heat sink
  2. ZN414 transistor
  3. Integrated circuits
  4. 2N3055 silicon NPN power transistor
  5. Raytheon CK718 PNP germanium hearing aid transistor
  6. 2N107 germanium alloy junction PNP transistor (General Electric (GE))
  7. American 2N34 PNP Germanium Alloy Junction Transistor
  8. LM317 adjustable linear voltage regulator
  9. Mullard OC170 germanium PNP alloy junction transistor
  10. OC603 from Telefunken bipolar transistor
  11. Raytheon CK722 PNP germanium junction transistor
  12. Soviet КТ315 NPN bipolar junction transistor
  13. TEWA TG50 germanium transistors
  14. TO-92 transistor packing unit shell
  15. Flanged power transistor packing unit shell
  16. 2N107 germanium alloy junction PNP transistor (General Electric (GE))
  17. 2N3055 silicon NPN power transistor
  18. American 2N34 PNP Germanium Alloy Junction Transistor
  19. Heat sink
  20. LM317 adjustable linear voltage regulator
  21. Mullard OC170 germanium PNP alloy junction transistor
  22. OC603 from Telefunken bipolar transistor
  23. Raytheon CK718 PNP germanium hearing aid transistor
  24. Raytheon CK722 PNP germanium junction transistor
  25. Soviet КТ315 NPN bipolar junction transistor
  26. SSI small-scale integration and MSI medium-scale integration integrated circuits (1964-71)
  27. TEWA TG50 germanium transistors
  28. TO-126 transistor packing unit shell
  29. TO-18 transistor packing unit shell
  30. TO-5 transistor packing unit shell
  31. TO-92
  32. TO-92 transistor packing unit shell
  33. Transistors
  34. ZN414
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