Live Lab Hangout #1.1 Posted

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Hi CWTIM, could you share the place for ask from faraway ?
Best Regards.

Hi dady,

It's an online market place called Taobao (sort of eBay for China, without the auction stuff).

However, I would hesitate to give the full link as given the appearance I'm still not very sure what they are (it maybe a small VFET chip inside a 182ES like case), and it's impossible to deal with them unless you can read/type Chinese.

If you can decrypt the attached screenshot and really keen, you'll be able to find the shop I used.

Thanks and regards.
 

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You have to compare at the same scale to get the real picture.

Those curves look quite genuine to me. Same mu, same Rd. They're holding their drain resistance and not showing signs of "flop-over"

I could make a nice amp with those. Don't pry those apart. 🙂
 

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THF-51T?

Dady mentioned of a Tokin THF-51S in a PM, so I searched a bit and ended up in a trusted shop where I got my 2SK82 before.

Interestingly the shop have picture of a THF-51T which looks exactly like my "refurbished" 182ES (the original 180ES have a flat base without the circle, like the THF-51S in the picture, and the Gate pin is different also).

Given the market price of THF-51S/T are lower than 182ES in China, now I have reason to suspect what I got is actually a "relabeled" THF-51T - well at least that's a real Tokin 🙂
 

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I can't imagine why they'd go to the trouble of re-labeling a higher frequency part as a lower frequency part. But, markets are weird I guess. It's also possible the "circle-bottom" was found on various parts at different times and means nothing.

They're probably cheaper because they haven't been on my YouTube channel. 🙂
 
Data sheets curves and others from real sit's on tracer.
Apparently not only 2SK180/ 182 but 2SJ24 can go freaky as well :deer:
 

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Good morning Christoph, one question, where you can get 2SK77 or 2SJ24?
They are the "SCARCER" like 2SK79 or an Gold Unicorn or a green dog.
The best holyweek for you and your family.
The best holyweek for the gentlemen of this thread.
 
....where you can get 2SK77 or 2SJ24 ?

@Dady

Thes same question to You 😀

@ Diyers

My intention is say one more time: be always careful
in particulary if we don't have detailed curves from
original data sheets to compare.In Tokin documentation
they are 2SK182 but not ES mentioned so is probably for 1kW parts.....
happyly we have Michael and Cwtim01.
Best regards 🙂
 

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Unobtainium

Here we go.

Unfortunately, despite searching a whole night I can only find 1 piece, so it's not going to be very useful. (Actually I found another piece, but the seller refuses to accept return in case of defective part, so I back off).
 

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