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IET » Electronic engineering » Original Transistors

Topic Title: Original Transistors
Topic Summary: Nomenclature
Created On: 03 June 2011 11:54 AM
Status: Post and Reply

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03 June 2011 11:54 AM
103MU Posts: 8 Joined: 12 September 2009	Does anyone have any information on prototype GEC & STC Point-Contact Transistors from the late 40's/early 50's. I have some "T" STC ones which have no known markings(such as 3X/100N etc). Just etched markings such as 261LAN. Regards, David
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03 June 2011 12:58 PM
ANFierman Posts: 121 Joined: 25 July 2008	I expect you've already found these but just in case: http://www.wylie.org.uk/technology/technology.htm http://semiconductormuseum.com/Museum_Index.htm https://sites.google.com/site/transistorhistory/Home/european-semiconductor-manufacturers/stc-data ------------------------- Andy Fierman --------------------------- http://signality.co.uk ---------------------------
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03 June 2011 02:05 PM
103MU Posts: 8 Joined: 12 September 2009	Thank you Andy for your reply. Andrew Wylie & I are in communication just now. However, I hadn't seen the American site before. Unfortunately it doesn't have anything on STC or GEC early UK Transistors. My suspicion is that the hand etched STC "T" encapsulated p-c transistors were put out to Universities & other research establishments for pre-production assessment. In those early pre - Pro Electron days there was no standardization of transistor markings. Their applications were mainly for switching & amplification purposes. Regards, David
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07 June 2011 06:34 PM
jencam Posts: 468 Joined: 06 May 2007	I asked my son if he knew anything about these early transistors because he has a collection of vintage electronic components. He said that published datasheets don't exist for prototype or custom components but there is a possibility that a manufacturer's spec sheet exists or somebody has characterised the devices in the past. There may even be articles about them published in electronics journals at the time when they were made.
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08 June 2011 10:05 AM
103MU Posts: 8 Joined: 12 September 2009	Hello Jencam, Thank you for your reply. I've just received info on the GET115/116 P-C transistors from Andrew Wylie. He has been extremely helpful. I'll keep delving, and update this post when I get any further info. Regards, David
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IET » Electronic engineering » Original Transistors

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