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I bought my last batch from Banzai. Dan Kennedy said:. Click to expand Joined Sep 20, Messages Location Texas. There's a group of LSKs to the right of that sort of hard to find in the crowd in this shot. Labelled batches 1 and 2 were a comparison of two different lots of BLs from Banzai.
Both were within Vgs Off range from the Toshiba datasheet, but as with many sources these days, the admittance characterized by the slope of the curve is lower than the known-originals. The lack of consistency in grouping the batch 1 group vs all others also gives me some pause, but isn't a dealbreaker as just about everyone here knows, JFET variability range within the same process is more than double that of BJTs; but original Toshibas and Linear Systems FETs measure quite consistently.
They'll all more or less work in similar applications, but if I'm trying to ensure I'm getting the all around performance and the relative consistency of the originals, I'd use the LSK A grade from Linear. The only challenge with those is that they go quickly at Trendsetter when they have them in stock.
After going crosseyed staring at JFET traces of over 25 types most bought from Mouser well before through hole JFETs started going extinct or inherited from a couple of retired TI engineers , I suspect that more than a few PFs still pretty widely available are being relabeled as and J The fake buyers are really getting burned on that deal. Nice work rackmonkey. This is exactly what I found in my limited study. There are two distinct and very consistent gain groupings with the real 2sk's being quite a bit higher.
Although your analysis is better than mine because you used Mouser parts as the control group, I think my results are good enough to claim that our results independently verify each other.
But again, it is worth noting that the fakes are actually pretty good. In a way they're actually too "good". If pushed, that difference might be audible.
Meaning the fakes have less distortion. So if you want a cleaner circuit, use a fake. If you want higher gain with a dash more 2nd, use authentic 2SK Whoops Well-known member.
Joined May 9, Messages 5, Location Portugal. I'd also like to know that. If they're sold as "2SK", that is a designation for a part with specific characteristics. The gain and noise differences are too significant to call those Bonzai and Ebay parts legitimate 2SK They are clearly another part entirely stamped with "K" to look like 2SK If the parts were advertised as 2SK from a reputable manufacturer that had a website and a datasheet, then we could test those and debate their value as a second source.
But non-branded transistors from Ebay seller yuwewe do not qualify as second source. Verified purchase: Yes Condition: New. I would do business anytime with this re seller. This is good Fet-transistors for my electric projects.
Sincerely, Slavomir from Slovakia. Provides excellent service. Skip to main content. About this product. Make an offer:. Stock photo. Brand new: Lowest price The lowest-priced brand-new, unused, unopened, undamaged item in its original packaging where packaging is applicable.
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