What To Do With Those 2SJ28's

[Soundhappy]

How many are you going to send me?

Well received 10 December at Papa Labs ? Kind regards

 

[WBS]

 

[Soundhappy]

@ WBS and Diyers Greedy Boyz are not curious about knowing what surprises were inside ?

 

[Zen Mod]

for Mighty Moi , Santa Pa was early this year



should I ask for more ?

 

[Zen Mod]

........

 

[Soundhappy]

? + multimeters

 

[Zen Mod]

drool!

I'm happy for ya!!

 

[nicoch58]

for Mighty Moi , Santa Pa was early this year

should I ask for more ?

lucky b ....

 

[WBS]

Univac! Ha! Does anyone else remember the days of entering data on punch cards?

Kids these days have no idea how easy they have it.

 

[Ben Mah]

Yes, it was slide rule and punch cards.

No such thing as calculator, personal computer, smart phone, PlayStation, etc. when I was young.

 

[Zen Mod]

YouTube

 

[woofertester]

Got curves?

Are they available?

How many are you going to send me?

2SJ20 curves attached. From left to right Vgs = 10,9,8,7,6,5,4

I am thinking that this would be a good candidate for an inverted polarity J2 at lower voltage and lower current for use as a headphone amplifier. Maybe cascoded as well for low voltage high current operation?

I bought two to satisfy my curiosity and just bought a few more as spares for a one-off build.

If you want to see any other curves or data, just ask.

Transconductance looks to be less than a typical LATFET. I will do that curve next.

 

[woofertester]

2SJ20 Vgs-Id and transconductance

Transconductance is the blue curve with negative slope.

Ids vs Vgs is the black curve with positive slope.

 

[Soundhappy]

2SJ20 curves attached..I bought two to satisfy my curiosity and just bought a few more as spares for a one-off build.

Congratulations Woofertester Components from Jim's Audio boutique are genuine as usual

 

[nicoch58]

....

Looking at my calendar, I think I can commit to a release in January.
.....

 

[Nelson Pass]

Late January......

 

[R-K Rønningstad]

We have the same planning tool it seems

 

[nicoch58]

Late January......

Nice ! thanks a lot

 

[awc]

No hurry Mr Pass im still practicing soldering, and im sure Vfets are like a good wine they get better with age, (im just glad I kept the Sony Vfet parts)

 

[Soundhappy]

New DIY Sony channel finally seeing the light.