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.
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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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.
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.
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.
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 The devices were originally made by Sanyo and although I have identified a couple of "second source" manufacturers for these parts, none of them have a name or symbol that ties in with the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.
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 The devices were originally made by Sanyo and although I have identified a couple of "second source" manufacturers for these parts, none of them have a name or symbol that ties in with the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.
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!?
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!?
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.
Wingshing version of this device looks like it may be the one. wingshing computer components.
It will be a 2SD1047, which indicates a low frequency NPN transistor.
A = Hi Freq PNP
B = Lo Freq PNP
C = Hi Freq NPN
D = Lo Freq NPN
F and J are xFET
here is your datasheet.
http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/1/2SD1047.shtml
If its a blown device, you can use that datasheet to find a set of replacements, or you can use the transistor params to test your current device.
A = Hi Freq PNP
B = Lo Freq PNP
C = Hi Freq NPN
D = Lo Freq NPN
F and J are xFET
here is your datasheet.
http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/1/2SD1047.shtml
If its a blown device, you can use that datasheet to find a set of replacements, or you can use the transistor params to test your current device.
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"Try contacting your reputable source."
Theoretically if enough people did that in series eventually the news could be passed along.
Theoretically if enough people did that in series eventually the news could be passed along.
we had transitors from this company in my country but not for audio was a tv tranistor for horizontal deflection
each and every one of them failed .... now who is copying who these days is realy not easy to say
each and every one of them failed .... now who is copying who these days is realy not easy to say
Thanks to everyone for the help with this issue.
I am increasingly of the belief that these probably are fakes or at least sub-standard.....
I have e mailed my source (Cricklewood Electronics BTW) this afternoon to try and get some information on these devices. It will be interesting to see what they have to say....
I think it unlikely that I will get any refund as they will no doubt claim that I ordered 2SD1047's, they supplied 2SD1047's, and that manufacturers may vary..🙁
I am now trying to find a new source as I don't trust these enough to fit them!
Strangely, Farnell stock them but don't have the complementary 2SB817!? They have the recent lead free version which data sheets hint have now got built in emitter resistors...
I am increasingly of the belief that these probably are fakes or at least sub-standard.....
I have e mailed my source (Cricklewood Electronics BTW) this afternoon to try and get some information on these devices. It will be interesting to see what they have to say....
I think it unlikely that I will get any refund as they will no doubt claim that I ordered 2SD1047's, they supplied 2SD1047's, and that manufacturers may vary..🙁
I am now trying to find a new source as I don't trust these enough to fit them!
Strangely, Farnell stock them but don't have the complementary 2SB817!? They have the recent lead free version which data sheets hint have now got built in emitter resistors...
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