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Topic Title: Original Transistors
Topic Summary: Nomenclature
Created On: 03 June 2011 11:54 AM
Status: Read Only
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 03 June 2011 11:54 AM
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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
 03 June 2011 12:58 PM
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ANFierman

Posts: 136
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

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http://signality.co.uk
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 03 June 2011 02:05 PM
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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
 07 June 2011 06:34 PM
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jencam

Posts: 608
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.
 08 June 2011 10:05 AM
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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
 25 September 2013 01:25 PM
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kengreen

Posts: 400
Joined: 15 April 2013

103MU,

I'm afraid this is about to establish a record as the most non-useful Post.

I attended some of the first classes in which representatives of manufacturers delivered lectures on their latest little wonders which boasted 50 percent waste. I had great fun building equipment using them and they presented problems which today it is hard to credit.

In all probability I once retained many such datasheets for which you appeal but, to my great regret, a family of mice found a better use!

Excuse me, I need to go comb this old grey beard!

Ken Green
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