Article - Sony VFETs part 1

[Soundhappy]

After Japan Post tracking number 2SK182 ES are ready in France

 

[Soundhappy]

is there someone buying from that source ? looks too good to be true ..

chineese fake again ?

1pcs NEW Tokin Transistor 2SK182ES Made IN Japan Shipping Charge Free | eBay

Genuine nos ones from confirmed source
Received today 3 day after どうもありがとうございます
Tokin are real elephant sit if compare with cute Sony.
Greetings

 

[Michael Rothacher]

They're quite impressive, aren't they

I'd love to take a transistor and tube shopping trip to Japan. I watched a video recently where a guy walks into a Tokyo electronics store and they've got boxes of stuff like this displayed in glass cases like jewelry. It would be fun to hang out with some Japanese audiophiles, listen to some big 'ol JBL 4343's, go to the Concorde for a burger and visit Sakuma...but I digress.

 

[dady]

Oh Sakuma, master....

 

[Zen Mod]

well , nothing wrong with toobz and iron (repetitive) and Lowther in barrel

 

[Michael Rothacher]

After that, I'm coming to Serbia.

 

[dady]

Have we a meeting there next summer ?

 

[Zen Mod]

this one or next one ?

 

[Soundhappy]

They're quite impressive, aren't they

I'd love to take a transistor and tube shopping trip to Japan
....and visit Sakuma...

Yeah please Mike take trip with Papa to Sakuma San ultra-fi workshop & food restaurant
don't be surprised if meet ZenMod on the same table after his teleportation from Serbia.

Nutube triode with sit's future of innovate amplifiers :

KORG INC and Noritake Co., Limited Release Innovative Vacuum Tube: the Nutube | News | KORG

Kindly regards

 

[Zen Mod]

naah

flat toobz are for sissies !

 

[Soundhappy]

Noritake Nutube triode is destinated for all audio applications but Korg are much musical instrument company i agree.
If old tubes become in 2015 revisited new technology this is hope semis industry produce new sit's
but for today i try how test few old stock on bench.
Have a nice day

 

[dady]

this one, a big nerdy meeting behind the iron curtain.

 

[Soundhappy]

Hi Diyers
Woow exciting video Sony 2SJ28 & 2SK82 Vfet powerfull Papa amp
in action play dynamic music

https://www.youtube.com/watch?v=MNEt2XXOkYo

Hope you enjoy it
Kindly regards

 

[res07njc]

sounds amazingly real, even with the camera mic.. feeling my humble mini-aleph jealousy.

"she fought just like a hurricane, but fell in love with Dixieland." lol

 

[dady]

sounds amazingly real, even with the camera mic.. feeling my humble mini-aleph jealousy.

"she fought just like a hurricane, but fell in love with Dixieland." lol

 

[R-K Rønningstad]

Fischer SK139

Good day to all you fearless amplifier builders.
Yesterday I deep dived into the shed, and behind summer tires, subwoofers and garden furniture I found two Fischer SK139-200 (20cm).
SK 139, Standard extruded heatsinks, Heatsinks f.cool, Fischer Elektronik
These are each at ca 0.25K/W. (I believe I got them for my never-finished ZV9.)
Is 0.25 just a little high, or will they suffice? What are your/our accumulated knowledge now? What I really ask, what is the real world experiences we have?
I will of course use a L profile of 265mm length. (And Permander PCBs.)

 

[Zen Mod]

palm rule will confirm that they're suitable , say , up to 80W per piece

if you have variac , some xformer and few power resistors , you can make burn test before chassis making

you can use mosfets instead of power resistors , for sure

 

[R-K Rønningstad]

Thank you, O' Mighty Zen Mod.
Consulting Our Guiding Light and Master of The SIT Art's article Sony VFETs in Push-Pull Class A
Part 1: Common Source Mode, Transformer Coupled he states a thermal resistance of 0.25 or less. I think it was the "or less" part that started me worrying.
California is usually warmer than Norway, however, one should not forget the global warming.....

 

[Zen Mod]

ya can always make Mighty Babysitter , if needed in Ca

 

[R-K Rønningstad]

Yes, I can sense the temperature on the heat sink and simply cut the mains.