B2 vfets 2sj26 & 2sk76

YAMAHA B2 FET transistors

and now .......

Pictures of unobtenable 2SJ38 and 2SK98 new ! :banana::banana:

Yamaha part number :

2SJ38 = IE400360
2SK98 = IE300540

:thmbsp:
 

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Hello !

I understand but if you want you can read my "service news" about B2

For your information the last transistors in B2 were :

2SJ38 ad 2SK98 :thmbsp:

Yours is the first mention I have ever seen of this and it would seem from the data sheets you once provided that these would not be able to survive in the B-2 with a VGDO limit of 55V as compared to the 150V of the J26 and even higher for the K76. :scratch2:
 
B2 v-fet 2sj26 & 2sk76

Hello NICK !

I have for IE300400 (2SK76) VGDO 200V with IDSS = 5A
for IE300410 (2SK76) VGDO 55V with IDSS not available in datasheet !
for IE300430 (2SK76A) VGDO 180V with IDSS = 3.5A

I realize by making comparison with the 3 datasheet there is confusion and probably bad info :scratch2:

IE300410 with VGDO 55V is non sense
all the substitute info were given by YAMAHA JAPAN almost 30 years ago ...What is right , what is wrong , today difficult to say ....

:scratch2:
 
What is right , what is wrong , today difficult to say ....

:scratch2:

Yes indeed. :yikes: :D

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From what I can gather, the earlier types (2SJ26) (such as in your primary B2) were much more robust VFet than the (2SJ26A) "A" version as mine.


50volt is a huge voltage advantage on the Drain-Gate from the earlier non "A" VFets versions which I expect translates into thicker deposits and a more expensive manufacture.

Early 80’s Yamaha would have been in the closing stages of Yamaha VFet, 2SJ26A /2SK76A manufacturing, even with the introduction of this “A” version in the late 70’s, which appears in latter B2’s, I would suggest this as a stop gap model, to keep costs under control.
 
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Sirs, thanks to the help I received from you and other facebook friends, I expanded my search. From what I saw in the searches I can use on my Yamaha B-2 v-Fets yamaha 2SK76 / 2SJ26 and 2SJ38 / 2SK98 and Sony 2sj18 / 2sk60. That's right? any more compatible?
I have already met some candidates, but still on any trusted site or other non-china vendor ... Can any one of you help me by pointing out some website where I could find them? Thank you very much
 
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