Fake *******ING "MOTOROLA" Transistors - Page 27 - diyAudio
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Old 7th February 2009, 05:54 PM   #261
pooge is offline pooge  United States
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Yes, they make TO3s. But I have never seen other than a completely flat surface on the bottom.
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Old 10th February 2009, 12:31 PM   #262
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Default Re: Motorola MJ15024

For Motorola MJ15024/MJ15025 transistors, MOT dont produce for a long time.

So MJ15024 you got you may really from MOT but it must be USED that got from old PCB if it has damage inside.

Better to buy ON brand now with 07+ or 08+
Originally posted by Mpole
Hi everyone,

I need your help. I bought some Motorola MJ15024 transistors.

I think they are genuine Motorola. But aslo I am not sure. I took some pics. There are some damage inside. Because, I could open it via drill only.


Click the image to open in full size.
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Old 18th February 2009, 11:48 PM   #263
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The picture you posted looks like a genuine Motorola or ONSemi T03 transistor. What does the mounting side look like?
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Old 20th February 2009, 01:56 PM   #264
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It's not easy to tell the difference.
In face,even the different TO-3 transistors might be manufactured at the same time and define the exact part number after the QC test.

If you really prefer ONSemi , you should buy from the local distributors.
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Old 19th October 2011, 08:07 PM   #265
Lazer is offline Lazer  Norway
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bought some motorola mj15024/25

Are those real?

For me the mj15024's look real and mj15025's looks fake

The mj15024 pad was embedded in silicone :P
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Old 19th October 2011, 08:19 PM   #266
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Originally Posted by -_nando-_ View Post

The other is from "motorola", and their top just jumped out when I attached it in a plain heatsink
First rule of electronics, always buy from reputable dealers.
Buy cheap, buy twice !
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Old 21st October 2011, 10:42 PM   #267
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How to you tear the top off the TO-3 devices.. I don't have a dremel.
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Old 22nd October 2011, 09:15 AM   #268
Lazer is offline Lazer  Norway
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Originally Posted by ouimetnick View Post
How to you tear the top off the TO-3 devices.. I don't have a dremel.
I just use a ordinary hacksaw. Works great and takes no more than 1 minute
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Old 13th October 2016, 01:09 PM   #269
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I'm jumping in a little late on this thread, but I saw that about 10 years ago while the discussion was very active that a pic based project was mentioned to have a good set up to test parts for QC and detect the fakes.
However that part of the discussion didn't go much further afterwards and I didn't see anything about the development for such a tester.
Has that idea been put into practice since then?
If not, I think it's still a damn good idea and it deserves attention.
I would be very interested myself in making such a device tester, and perhaps it might even be practical to add one more feature, that would also contribute to bust the fakes, while at the same time do something some of us would really like to do, which is to do a non-destructive second breakdown test.
I am about to get a pickit and a few pic chips. Probably not the best pic chips suited for such an application, but the suitable type should be easy to get.
Perhaps linking this tester to an arduino and send the result data to a computer would be great.
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