2SK170BL and 2SJ74BL

[CeeVee]

Hi,

Selectronic dealer of france have all the time this parts in stock BL or GR kinds. You must just matched them.

This dealer have also other specific parts for audio : nichicon, elna, black gates capa ....

www.selectronic.fr

I checked, none available....🙁

 

[nr12]

Thanks for your image, masag1. The 2SJ74BLs bearing the code "7C" have already been described as fakes by @h_a here:

http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-1033.html#post2476459

Now you can guess that these "High Idss 2SJ74BL" offered here

20 X 2SJ74BL (10 Matched pairs) - HIGH IDSS | eBay

are also fakes (Seller says: They were manufactured in Malaysia)

You are right. Mine just arrived today. Code "7C". Hardly readable.

But CHEAP!

 

[generg]

Congratulations....🙂 to CeeVee

 

[heinz1]

You are right. Mine just arrived today. Code "7C". Hardly readable.

But CHEAP!

I'd like you be right, but not in this case. 😉

So you can confirm the Idss range mentioned by the seller? Have you yet determined the transconductance of these parts?

 

[Kovax]

Fakes:
Fakes:
Originals:

 

[qusp]

Hi,

Selectronic dealer of france have all the time this parts in stock BL or GR kinds. You must just matched them.

This dealer have also other specific parts for audio : nichicon, elna, black gates capa ....

www.selectronic.fr

a search for 2sj74 on their site turns up nothing

 

[Kovax]

As far as the picture tells, these look real (the big picture scroll down)

8 X MATCHED 2SK170 2SK170BL 2SJ74 2SJ74BL FET! | eBay

 

[tinitus]

As far as the picture tells, these look real (the big picture scroll down)

8 X MATCHED 2SK170 2SK170BL 2SJ74 2SJ74BL FET! | eBay

looking at other interesting stuff on home site, appears to be an honest seller

 

[Kovax]

looking at other interesting stuff on home site, appears to be an honest seller

Honesty has nothing to do with trading (actually it's bad for business). Most of the fakes I received came from sellers who were honest, but not know they had fakes.

 

[heinz1]

looking at other interesting stuff on home site, appears to be an honest seller

Perhaps the most interesting item for us right now might be this one:

4 X RARE MATCHED 2SK170 2SK170V 2SJ74 2SJ74V FET | eBay

Set of matched 2SK170V/2SJ74V. The batch code is "8C" in both cases. Is anyone here familiar with Toshiba's batch codes and could tell us what they mean?

It might be possible that the fake SJ74s bearing the batch code "7C" are indeed mislabeled V grade, as previously suggested.

 

[dodo]

the double pair of the complementary jfets 2sk246bl/2sj103bl could be used as replacement for the pair of2sk170/2sj74 as an input buffer

 

[prooptiki]

As far as the picture tells, these look real (the big picture scroll down)

8 X MATCHED 2SK170 2SK170BL 2SJ74 2SJ74BL FET! | eBay

I have bought from this seller almost a year before, genuine parts around 8.3mA!

 

[EBA]

Hi,

For the check to the web side selectronic : materiels audio video / composants actifs spéciaux / transistors
You will find , 2 SK 170 / 74 and 246 / 103

 

[Kovax]

Can someone please post a close-up picture of the original Toshiba 2SJ108BL? Pretty please?

Regards, Kovax

 

[zhoufang]

the double pair of the complementary jfets 2sk246bl/2sj103bl could be used as replacement for the pair of2sk170/2sj74 as an input buffer

I will like to alert everyone that Toshiba has announced EOL (discountinue) for ALL through hole JFET, all of them.
Only a few SMT JFET with low transconductance are left.

Same thing is happening to their audio specific MOSFETs.

It seems to me that linear audio is going the same direction as tubes.

 

[generg]

Hi,

For the check to the web side selectronic : materiels audio video / composants actifs spéciaux / transistors
You will find , 2 SK 170 / 74 and 246 / 103

Thanks I found it.....😀

SELECTRONIC ::: L'univers électronique :::

Really a hard price.....🙁

 

[QSerraTico_Tico]

2SJ108 or 109???

 

[Kovax]

2SJ108 or 109???

2SJ108 please, 109 I have so I know how it looks. Thx.

 

[ramallo]

Curious, this guy have 3 more like this:

200 each: RARE Toshiba 2SJ74BL and 2SK170BL TO-92 JFETS - eBay (item 250816623470 end time Jun-06-11 17:16:43 PDT)

If are real parts, someone wants to do a GB? (I want 50) :-D

 

[Kovax]

Curious, this guy have 3 more like this:

200 each: RARE Toshiba 2SJ74BL and 2SK170BL TO-92 JFETS - eBay (item 250816623470 end time Jun-06-11 17:16:43 PDT)

If are real parts, someone wants to do a GB? (I want 50) :-D

Ask the seller for a close-up picture of 2SJ74BL. If you can't see traces of copper (reddish) where the legs join the body they are probably fake. All the fakes I got from China missed that little detail (and some were not TO92 as Magura has shown).