X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <5001314B.3010403@estechnical.co.uk> Date: Sat, 14 Jul 2012 09:43:55 +0100 From: Ed Simmons User-Agent: Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: geda-user AT delorie DOT com Subject: Re: [geda-user] Help Identify MON Transistor?? References: <1342237267 DOT 98959 DOT YahooMailNeo AT web65902 DOT mail DOT ac4 DOT yahoo DOT com> In-Reply-To: <1342237267.98959.YahooMailNeo@web65902.mail.ac4.yahoo.com> Content-Type: multipart/alternative; boundary="------------080504030206000903050902" X-Authenticated-As: ed AT estechnical DOT co DOT uk Reply-To: geda-user AT delorie DOT com This is a multi-part message in MIME format. --------------080504030206000903050902 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 14/07/12 04:41, Edward Comer wrote: > This is a bit off-topic - but - I am reverse engineering a circuit > board so that I can make a new PCB with some changes. There are two > surface mounted transistors in SOT23 configuration. One that is marked > "t04" and using a multimeter, it tests out as an NPN transistor and I > found some documentation that states that a "t04" is a PMBS3904 which > is equivalent to a 2N3904. However, the markings of the second > transistor are a mystery to me (It is marked "MON") and it does not > test out as an NPN or PNP transistor. I suspect that it may be a > MOSFET. Does anyone have any info on this transistor??? Here's a link to a DIY curve tester.... http://www.techlib.com/electronics/curvetrace.html This should give you very helpful info in your quest to reverse engineer! --------------080504030206000903050902 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit

On 14/07/12 04:41, Edward Comer wrote:

This is a bit off-topic - but - I am reverse engineering a circuit board so that I can make a new PCB with some changes. There are two surface mounted transistors in SOT23 configuration. One that is marked "t04" and using a multimeter, it tests out as an NPN transistor and I found some documentation that states that a "t04" is a PMBS3904 which is equivalent to a 2N3904. However, the markings of the second transistor are a mystery to me (It is marked "MON") and it does not test out as an NPN or PNP transistor. I suspect that it may be a MOSFET. Does anyone have any info on this transistor???

Here's a link to a DIY curve tester....

http://www.techlib.com/electronics/curvetrace.html

This should give you very helpful info in your quest to reverse engineer!
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