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Old 20th June 2013, 04:06 PM   #1
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Default 2SK1530+2SJ201

Hi,

Does anyone have any experience with this vendors mosfets?

If they are fake, who has them?


Thanks!
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Old 20th June 2013, 04:48 PM   #2
NicMac is offline NicMac  Italy
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I don't know about that vendor, but you might want to have a look at the stuff in my signature
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Old 20th June 2013, 11:39 PM   #3
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Thats not even remotely funny.

..unless you are able to find two more pairs of those type 1 transistors, of course.

I understand that you are sold out, but please let me know!
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Old 21st June 2013, 04:13 AM   #4
NicMac is offline NicMac  Italy
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I was not trying to be funny - just to help

If you need Vgs matched N and P devices you might also check what member Blues or Zhoufang have left.

Not really the same thing, but certainly genuine devices.
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Old 21st June 2013, 05:56 AM   #5
EUVL is offline EUVL  Europe
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> Does anyone have any experience with this vendors mosfets?

They don't even define what is meant by matched.

At what temperature ?
Single point or curve traced ?
Over what current range ?
To what tolerance ?
NNPP match or just NN-PP match ?

As already extensively published, all the above have a significant factor on matching and especially on matching yield.

> ..unless you are able to find two more pairs of those type 1 transistors, of course.

I don't think anyone else can / will provide those for you (tight NNPP match under working conditions).
You might, at best, get single point match at room temperature.


Just my 2 cents,
Patrick
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Old 21st June 2013, 07:26 AM   #6
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Default EKV MOSFET models for these?

Anyone know where to get good EKV SPICE models for these devices?

I think Bob Cordell had some but he's misplaced them.
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Old 21st June 2013, 08:59 AM   #7
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Quote:
Originally Posted by NicMac View Post
I was not trying to be funny - just to help

If you need Vgs matched N and P devices you might also check what member Blues or Zhoufang have left.

Not really the same thing, but certainly genuine devices.
Just trying to be funny myself!

I know the matching might not be optimal, but Im out to buy regular devices for my f5 first of all. NicMac brough up the matching.

Ill send blues a pm.
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Old 22nd June 2013, 05:20 PM   #8
AndrewT is offline AndrewT  Scotland
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The F5 uses a single pair of N & P, these do not need to be matched N to P.

A stereo set requires two pair, these do not need to be matched, neither N to P, nor N to N or P to P.
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Old 22nd June 2013, 06:12 PM   #9
tinitus is offline tinitus  Europe
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nah, but some kind of matching might help to ensure they are genuine

looks like its become a risky affair to buy anything these days
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Old 22nd June 2013, 06:50 PM   #10
NicMac is offline NicMac  Italy
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Quote:
Originally Posted by AndrewT View Post
The F5 uses a single pair of N & P, these do not need to be matched N to P.

A stereo set requires two pair, these do not need to be matched, neither N to P, nor N to N or P to P.
Is that really so? No effect on distortion whatsoever?
Certainly, a channel mismatch may/will lead to channel imbalance. No?
Of course this might be corrected by moving one speaker 5 cm
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