Old Soul

[Zen Mod]

don't want to discuss them in general, having enough of these for repair ...... and never being impressed with legendary 3020

this detail (Mos+bjt) being sole reason for puzzlement ........

but, not saying that one can't find plethora of nice tricks in their schematics

 

[twitchie]

These 2SA1943?

Right ones?

 

[GnuB]

Ah, the explorer spirit. Do they offer bridges at Ali?

Dang! Now why didn't I think of that? I'll let you know if I find a good deal! 😉

 

[bknielsen]

don't want to discuss them in general, having enough of these for repair ......

I've smoked one beyond repair (according to repair shop) in my earlier HIFI days. I bridged it into a 4Ohm 76dB sensitive diy copy of the Apogee Scintila. That was before I learned not to do that 😀.

(I'm sorry - had to tell that story....back to topic)

 

[Zen Mod]

Right ones?

yup

nice ones

 

[Soundhappy]

Right ones?

https://www.mouser.com/datasheet/2/408/2SA1943_datasheet_en_20160107-1649828.pdf

https://www.mouser.com/ProductDetai...MI--Pxi-Wh8AIV9CCtBh3kBQvjEAAYASAAEgKckvD_BwE

Wait be back in stock 18 may 2021 from Mouser and at very good price.
Edit: Photos of two versions, other country made good transistor and good made in Japan

Genuine

 

[Soundhappy]

Toshiba NPN complementary to 2SA1943 are in stock now BTW 🙂

https://www.mouser.com/datasheet/2/408/2SC5200_datasheet_en_20160107-1649945.pdf

2SC5200-O(S1,F Toshiba | Mouser

 

[Capt Grogg]

2SA1943

Right ones?

Those are suspect, wrong package for 2SA1943
2SA1941/2 better behaved than 2SA1943. Look at Ic-Vbe curves for each.
Each new generation of Toshiba output are die shrunk compared to previous series, contrast 2SA1265 to 2SA1941 Ic-Vbe curves. I believe it happened again with TTA series.
The second highest current model i.e. 2SA1941 or 2SA1942 (which share the same die in different package) usually have best overall balance of characteristics.

 

[Zen Mod]

oh yeah - my bad, but just half

I was evidently distracted , so was thinking that twitchie was asking about 2SA1491, and they;re in sorta that package

though - I know that I saw same packaged 2SA1943/2SC5200 in last few days , at reputable Vendor pages

I was sorta surprised, but - not that I'm using much bjts in last few years

see

https://eu.mouser.com/Semiconductor...sistors-BJT/_/N-ax1sh?Keyword=2SA1943&FS=True

Blocked

 

[Capt Grogg]

2SA1943N

Wow, looks like they offer the large die in TO3P as 2SA1943N ! Mouser has wrong datasheet attached showing large package non N 2SA1943. Would still prefer the smaller die in larger package 2SA1942 but not stocked by distributors.

 

[grataku]

oh yeah - my bad, but just half

I was evidently distracted , so was thinking that twitchie was asking about 2SA1491, and they;re in sorta that package

though - I know that I saw same packaged 2SA1943/2SC5200 in last few days , at reputable Vendor pages

I was sorta surprised, but - not that I'm using much bjts in last few years

see

https://eu.mouser.com/Semiconductor...sistors-BJT/_/N-ax1sh?Keyword=2SA1943&FS=True

Blocked

Great! A volcano of creativity!
What's you favorite? Sissy-SIT, LuDEF, or Sissy-Ge?

 

[Zen Mod]

as Pa sez - this one I'm working on ...........

latest one is SET

damn good amp, never mind it is latest

we'll see what I'm going to think about next one ...... me naive, always risking either 2 Day Glory , or Eternal Public Disgrace

 

[twitchie]

2SA1943

The ones I posted previously are from Mouser and they have it listed as a new item so Motorola must be putting them into TO-247 now.

I got a batch of the older package from Digikey so I have both now

Yes, Greedy

2SA1943-O(S1,F Toshiba | Mouser Canada

 

[analog_sa]

I got a batch of the older package from Digikey

Get them while they last 😀

 

[marconi118]

are the one from TME genuine?
at 1€ piece?

 

[Zen Mod]

supposedly yes

these I bought previously, same as few of my guys did - they look as real deal and behave as real deal

TME is big Vendor

 

[marconi118]

reichelt.de is a big vendor too but sells sometimes fakes.....

 

[Zen Mod]

well, what I can say, besides what I already wrote ...... 🙂

aha, yes - sorry Boyz, no new amps today

 

[bknielsen]

reichelt.de is a big vendor too but sells sometimes fakes.....

I think that statement needs to be followed up by a specific example.

 

[Zen Mod]

Kits: https://www.diyaudio.com/forums/swap-meet/372978-soul-soul-bip-kit-packages.html#post6673946