Sony VFET Amplifier Part 2

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2 picoDumbs

2 picoDumbs

Member
Joined 2013
CeeVee said:
While i admire immensely your aesthetic talent....and would like this amp to be look so special as it is ...please listen to ZM ...and read EUVL's paper on heat-sink heat distribution.

If you can combine all this with a truly unique and gorgeous design ...man you are the man. !:D:D:D
Click to expand...

Actually Euvls paper is based on some lab work I did for him. Except I mapped the entire heatsink through laboratory measurement.
He then came up with a way to mathematically model it.

So yeah as it has been said repeatedly, it is best to space mosfets further apart for best efficient use of heatsink.
 
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J

jps1964

Member
Joined 2013
... Mr. Fantastic... oups, not me, but the new design!

300mm length, TO247 or TO3 for IRF/P...
 

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W

WalterW

Member
Joined 2012
Paid Member
gadut said:
when i flip those 2 vfet, tadaaa the G and S position is opposite to KD-33. is this possible?
Click to expand...

Just received 2 x 2SK82 from Ebay seller "polida2008" and I'm sorry to say, fakes again.
They look exactly like yours with good JA-33 printing, but when flipped the G and S is opposite.
Put a drop of Isopropylalcohol on them and you wipe off the text completely :mad:

Then I measured them and yes, relabeled 2SK60s again.

I stop here, no more VFET's from Alibaba or Ebay for me.
 
H

hifibluedevil

Member
Joined 2004
WalterW said:
Just received 2 x 2SK82 from Ebay seller "polida2008" and I'm sorry to say, fakes again.
They look exactly like yours with good JA-33 printing, but when flipped the G and S is opposite.
Put a drop of Isopropylalcohol on them and you wipe off the text completely :mad:

Then I measured them and yes, relabeled 2SK60s again.

I stop here, no more VFET's from Alibaba or Ebay for me.
Click to expand...
isn't 2sk60 a vfet as well? So if it works, it can be used in a different design?
 
gadut

gadut

Member
Joined 2008
WalterW said:
Just received 2 x 2SK82 from Ebay seller "polida2008" and I'm sorry to say, fakes again.
They look exactly like yours with good JA-33 printing, but when flipped the G and S is opposite.
Put a drop of Isopropylalcohol on them and you wipe off the text completely :mad:

Then I measured them and yes, relabeled 2SK60s again.

I stop here, no more VFET's from Alibaba or Ebay for me.
Click to expand...

you are not as greedy as me, I bought 4pairs which cant be returned. Well if it's 2SK60 then at least it can be used someday, who knows Papa will release another vfet version :drink:
 
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