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Old 22nd June 2013, 07:58 PM   #21
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by NicMac View Post
Does it not bother you at all that the amp might have sounded better with correctly matched devices?
not one bit
Im happy if it sounds good

Quote:
Originally Posted by NicMac View Post
If not, why buy matched devices at all
like I said, it helps to ensure they are genuine

besides, apart from a standard F5, I also plan to use them in multiples for a classAB, and the matching is needed
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Old 22nd June 2013, 09:21 PM   #22
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Default Matching FETs

Quote:
Originally Posted by NicMac View Post
... use Idss matched K170/J74 even if Papa clearly says that they have to be Yfs matched.
Within a FET family and probably within a type of construction, it appears that Idss, Yfs & Voff are well correlated.

I don't have much experience matching MOSFETs but I do with small signal JFETs used in mikes ... the 2n54xx & u3xx range

You certainly see this in the datasheets. If Idss is matched, it is likely that Yfs in the sensible current range is matched and so will Voff
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Anyone have a pointer to EKV models for these MOSFETs?
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Old 25th June 2013, 12:56 AM   #23
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Originally Posted by tinitus View Post
please, lets not confuse the poor man more than 'need be'
Poor man? Thanks for that one!

Of course n - p matching makes a difference, even if its not necessary. I dont HAVE to build the f5 either, even though it feels like it right now.

But no one knows where to find these as only two unmatched pairs? Seems like blues also have matching quads.
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Old 25th June 2013, 05:05 AM   #24
NicMac is offline NicMac  Italy
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As Zen Mod told me a few days ago: choose your own poison
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