Odd SIT/vFET 2SK2087C

[Zen Mod]

Pass is Both

Nice and Evil

but ZM is Omninice

arranged to get some, so will make Babelfishes of all yours

 

[maximax77]

I can’t find any suppliers apart from potentially:

• https://www.transistormosfet.com/transistor?search=2SK2087C
• https://m.yoycart.com/Product/588501430725/

Neither of them looks credible to me. Ali, eBay and wakamatsu yield no results. Of what use is their low price if they are not available in quantities?

 

[woofertester]

I ordered 10 pcs from transistormosfet. The package is in the USA but not to me yet. When I receive the package, I will curve trace the lot and post the results in this thread. It could be a week or more before the package gets to me. I will also characterize Vgs and transconductance at some Vds and Id to see how far the spread is for the 10 pcs. My experience with the lot from Mr. Pass's stash of LU1014D, leads me to believe that a minimum of 100 pcs will be required to make matched pairs of the entire lot.

 

[von Ah]

I ordered 10 from yoycart on a whim when this thread started. They are used pulls. Looking forward to testing them with help from this crazy bunch of SIT-heads.
https://www.yoycart.com/Product/558187692471/2SK2087C_(K2087C)_Original_dismantling_m

 

[wangweiliangb]

I ordered 10 pcs from transistormosfet. The package is in the USA but not to me yet. When I receive the package, I will curve trace the lot and post the results in this thread. It could be a week or more before the package gets to me. I will also characterize Vgs and transconductance at some Vds and Id to see how far the spread is for the 10 pcs. My experience with the lot from Mr. Pass's stash of LU1014D, leads me to believe that a minimum of 100 pcs will be required to make matched pairs of the entire lot.

Thanks, looking forward to it.

 

[Ben Mah]

I hope it works out for everyone. My Aliexpress purchase was not a success:

https://www.diyaudio.com/community/threads/odd-sit-vfet-2sk2087c.385288/post-7010641

 

[pfdavid]

The Evil Pass would have purchased them all, but the Nice Pass bought a just few so that he could design a nice project of them for DIYers.

Assuming they pan out you will see that before long...

Hi Nelson, thanks for keeping us greedy boys in the game. Could you help us find a reliable source for these devices? They seem to be vanishing from previous providers, and with all the fake devices in the market, reliable sources seem the exception rather than the rule. - David

 

[von Ah]

They arrived. Definitely used.

This is as far as I’ll get with testing today. I was of course curious what would come up.

Good luck to others!

 

[Zen Mod]

looking good!

 

[von Ah]

Here are the results of my 10 units measured with my cheap transistor tester in the above picture.

Are these meaningful? Or do I need a more in-depth test?

 

[Dennis Hui]

I hope it works out for everyone. My Aliexpress purchase was not a success:

https://www.diyaudio.com/community/threads/odd-sit-vfet-2sk2087c.385288/post-7010641

I also got my delivery.

I noticed the seller has changed the listing to make it a single device. This is obviously a fraud attempt.

Those whose orders on aliexpress were cancelled are the lucky ones.

Did anyone else get something from aliexpress?

 

[codyt]

Dennis, was it a random TO-220 device, like Ben received?

 

[Dennis Hui]

Yup. An old plastic package mosfet. Please see attached.

 

[codyt]

Dang, that's too bad. Guess I know what I'll be getting...

 

[Ben Mah]

Aliexpress has offered a refund of CAN $31.26. I paid a total of CAN $34.73, including shipping, so I am holding out for the full amount on principle. I still have Paypal and my credit card as backup if I don't get any satisfaction from Aliexpress.

 

[codyt]

Aliexpress has offered a refund of CAN $31.26. I paid a total of CAN $34.73, including shipping, so I am holding out for the full amount on principle. I still have Paypal and my credit card as backup if I don't get any satisfaction from Aliexpress.

Out of curiosity, what are they claiming the 3.47 is for?

 

[Ben Mah]

They didn't elaborate. They just offered $31.26.

 

[Dennis Hui]

I also just submitted a dispute claim for the full amount of $34.73 CAD.

Cody and Ben, maybe this is the universe telling us to build something else? Anyone want to try a Beast or mini beast? https://www.diyaudio.com/community/threads/beast-with-1000-jfets-redux.364186/page-17#post-7013040

 

[Ben Mah]

Dennis, I have enough SIT/VFET amps so yes, I am ready to try something else. I was just reading about the beast this morning and it is definitely something that I am interested in building.

 

[Zen Mod]

I've just gave you a recipe which Thousand Beast is most interesting

Anything bellow that is just ....... boring .......