Does anyone know the manufacturer and origins of this transistor? - diyAudio
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Old 2nd March 2010, 04:50 PM   #1
jez is offline jez  United Kingdom
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Default Does anyone know the manufacturer and origins of this transistor?

Just got some of these in for a repair.The originals are of course Sanyo but I don't recognize the logo on this device and all the on line guides to manufacturers logos seem to omit this one....
I presume it's probably ok as a fake would at least try to look like the original!?
It came from a usually reputable source.
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Old 2nd March 2010, 06:52 PM   #2
jez is offline jez  United Kingdom
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Everyone as stumped as me on this one then?
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Old 2nd March 2010, 07:01 PM   #3
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Quote:
Originally Posted by jez View Post
Everyone as stumped as me on this one then?
Well i did try with google Unfortunately decifering the first letter (of what we assume is the manufacturer) isn't easy, following that the second letter could be an "f" or a "j" & i didn't find anything

At least you aren't alone Sorry...

E2A:- actually the last letter could be an "l" (as in L) if number 2 is an "f", something i didn't try.
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Old 2nd March 2010, 07:22 PM   #4
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I found a post about that by Nigel Goodwin. "Japanese Transistors only have part of
the number on them." Try adding the 2s to the number and look for 2sd1047. When I did this I came up with a data sheet with a picture of your device.
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Old 2nd March 2010, 07:38 PM   #5
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Quote:
Originally Posted by woody View Post
I found a post about that by Nigel Goodwin. "Japanese Transistors only have part of
the number on them." Try adding the 2s to the number and look for 2sd1047. When I did this I came up with a data sheet with a picture of your device.
Right.
This one look like a Fairchild, but the logo is curious..
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Old 2nd March 2010, 07:43 PM   #6
jez is offline jez  United Kingdom
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The letters look like a very stylised "S" followed by an "H" . Fairly certain about the H but the S could just about possibly be some sort of symbol.... I reckon it's an S though!
Woody, thanks for your efforts but I'm well aware of the conventions of Japanese transistors... The devices were originally made by Sanyo and although I have identified a couple of "second source" manufacturers for these parts, none of them have a name or symbol that ties in with the device in the photo!
The way that manufacturers seem to keep changing names and logos lately it could even be some new Sanyo logo!?... doubt it though.
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Old 2nd March 2010, 07:50 PM   #7
jez is offline jez  United Kingdom
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Event Horizon,
You know, I've just had another look and you could well be right about the letters after the stylised S .... I had only seen an H but it could just as well be a j or f followed by a t or l! I couldn't see the wood for the trees there!?
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Old 2nd March 2010, 08:26 PM   #8
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datasheetcatalog.com list 3 sources for that device. The pdf file drawing for the
Wingshing version of this device looks like it may be the one. wingshing computer components.
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Old 2nd March 2010, 11:23 PM   #9
jez is offline jez  United Kingdom
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I took a look at that device and I can't see anything to indicate them as the source?
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Old 3rd March 2010, 12:27 AM   #10
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Date code wk 35 2009...so a newish part?

Sanken comes to mind but the logo is wrong I think.
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