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 Forum index » DIY Hardware and Software » The Repair Shop
Repairing a Stylophone 350S- transistor identification!
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casiotone133



Joined: Jun 18, 2011
Posts: 3
Location: Lewiston, NY

PostPosted: Tue Aug 27, 2013 11:27 pm    Post subject: Repairing a Stylophone 350S- transistor identification! Reply with quote  Mark this post and the followings unread

Fixing up an old Stylophone 350S, and some of these these transistors came desoldered from the board. Can't find anything on the internet so far, is this before standardization in the coding? Markings say: E5383. Is this the same as a 2N5383? Any help would be appreciated!


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Gaetano_AU



Joined: Oct 08, 2011
Posts: 49
Location: Australia

PostPosted: Sat Nov 16, 2013 6:43 am    Post subject: Reply with quote  Mark this post and the followings unread

Since you have four to test.

1. First try to identify what type they are, if indeed they are functioning AND they are common Bi-Polar (PNP or NPN), e.g.,:

http://www.zen22142.zen.co.uk/ronj/cpt.html

OR

http://www.wikihow.com/Test-a-Transistor

2. If that works, then measure the Gain (beta) with a cheap multimeter, which does transistor testing, the meter will show which leg goes where once you have identified them.

3. You should if all goes well have FOR EXAMPLE identified the type:

e.g., type = NPN

AND beta = 350

USE a standard BC549B, which is an NPN and has a BETA of:

200 < BETA < 450
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