For Sale Matched TOS: K170/J74

[prakit]

Eric, I have been working with these devices far too long I want to tell you. I know what are fake and genuine.
Regards
Prakit

 

[prakit]

I doubt about your “genuine “ J74.
I have a near full box of J74GR also with silk-screen lettering. Check out how the “7” looks.
You’d better do some more research.
View attachment 1178559View attachment 1178560View attachment 1178561View attachment 1178562

Box full or 10 box full doesn’t change anything, search this website and draw your own conclusions. Members have been warned at least.

Example of genuine JFET;

https://www.ebay.com/itm/256070315974

Enough said.

Cheers
Eric

Nothing can change your belief anyway.

 

[lcsaba]

I got exactly the same JFETs with straight letters from Borbely Audio many years ago. Never thought those are fake.

 

[jean-paul]

So original parts are declared fake and Ebay is used as a source to show original ones?! Strange world.

 

[e_fortier]

Yep, the eBay link is from a reputable seller (according to NP and others)
Buy your JFET wherever you want, just make sure to use regular PayPal (not FF) or a CC so if there’s an issue you’ll be covered.

I’m done now.

BR,
Eric

 

[stonegreen]

Take a look at this post.

 

[jean-paul]

The price one pays for keep using obsolete parts in new designs. No more no less. Eventually everyone will be so suspicious that all will be expensive and declared fake at the same time 😀

 

[prakit]

Take a look at this post.

for fun, I broke up a J74. Here’s the pic.

 

[mason_f8]

I've been a DIY hobbyist for 50 years since my school days and all of these JFETs I have were acquired when they were still in production. At that time, there were no fakes on the market as they are now, and there was no e-Bay or Ali.
Here are some pics of what I own. These are all genuine Toshiba products. (Confirmed by measuring gm and noise)

4 on top left.The old print production has a straight 7 character.

4 on the top right.
The new laser-engraved production has the letter 7 curved.

2 on the bottom left K170 from the old print on is also a straight line.

4 on lower right the printing of K147 /J72 produced at that time are also straight.

I stumbled across this thread today and am the first member to know prakit, so I have no affiliation with him.

All I can guarantee is that some of the J74 characters printed by genuine Toshiba are straight, and I do not guarantee the authenticity of what prakit sells.(probably real, I think)

 

[myleftear]

Sideliner annoying newbie-question: „TOS“ stands for … TOShiba?

🙏🏻🙂

 

[prakit]

Yes, TOS=Toshiba. I am not sure where this came from either. Probably it's the nomenclature used in the stock market?

 

[RM]

Prakit is a well known seller here. In the event of fake products slipping through I’m sure hi will fix that immediately.

No need for harassment.

R

 

[jean-paul]

The suggestion is already false.

 

[Mikerodrig27]

When it comes to these Toshiba parts, we have a lot of people walking around magnifying glasses around here. Which is a good thing and well warranted considering the market. If Prakit were selling fake anything, there is no way he could have been selling these parts for so long and still hold such a good reputation.

 

[prakit]

Matched Octet:K170/J74BL for sale.
$70/set, free shipping worldwide.

 

[prakit]

Last two MOs available, 7.0mA and 7.2mA. $70/set free shipping.