Good Sanken 2SA1859 & 2SC4883 NOW EOL

[Dibya]

2SC4883 and 2SA1859 are excellent part for VAS stage unfortunately they are hitting EOL



2SA1859 ｜Sanken Electric


Very Linear and very low COB value.
Most importantly very fast!!



Well it seems not many good VAS transistor are left.

 

[sajti]

I think that 2SC4883/2SA1859 was better as driver, than VAS. I use KSC3503/KSA1381 as VAS.

Anyway the 4883/1859 pair was the last excellent driver. Now we have only the MJE1503x range, which are slow, and have high internal capacitance, or Toshiba TTC011B/TTA006B, which are a bit weak.

 

[Bensen]

Anyway the 4883/1859 pair was the last excellent driver. .

What about 2SC4382 and it's complementary?
These are still available as far as I know.

 

[sajti]

With ft=15MHz? Slow to drive modern output devices.

 

[trung224]

Getting 25 pairs of them recently, enough for at least 4 diy amplifiers.

 

[jaycee]

30pF cob ? Too much for a VAS.

 

[sajti]

Anyway 2SC2837/2SA1186 and 2SC6145/2SA2223 is EOL too

 

[Dibya]

"2SC2837/2SA1186 and 2SC6145/2SA2223" have amazing specs.



Hope Sanken will provide better transistor in future otherwise they are out of their mind.

 

[sajti]

"2SC2837/2SA1186 and 2SC6145/2SA2223" have amazing specs.



Hope Sanken will provide better transistor in future otherwise they are out of their mind.

Linear audio is not a big business any more
I see D'Agostino replace the Sanken outputs to Onsemi in his new generation Progression amplifier.

 

[Dibya]

Toshiba have TTA004B and TTC004B is still good enough for 80W amp, what i target personally.

I will stop making amp if I have to move On semi Output unless they improve those MJ series not so linear thingies


VAS: Fairchild KSC3503/KSA1381
Driver : Toshiba TTA004B/TTC004B
Output: Toshiba 2SC5200/2SA1943


Kinda a sad honestly , Good Sanken transistor going away

 

[jaycee]

I will stop making amp if I have to move On semi Output unless they improve those MJ series not so linear thingies

Fairchild are part of Onsemi now, so...

 

[BV]

Try Unisonic 2SC4793/2SA1837 as driver..

 

[minek123]

Digikey still has them in stock:
Digikey link

 

[xrk971]

I have a bag of about 40 NOS Toshiba 2SA1837. They are perhaps one of the best audio driver transistors ever made. Also gone the way of the dodo.

 

[Dibya]

I am making a conspiracy theory , this is agenda by big corporation to kill Class AB to move us to Class D.


Well well that's a joke , hope Sanken/Onsemi/Toshiba doesn't takes it seriously.


@xrk971 Hi X , how will you compare 2SA1837 with TTA004?

 

[arthur]

Digikey still has them in stock:
Digikey link

2SC4883 are almost gone!

 

[sajti]

@xrk971 Hi X , how will you compare 2SA1837 with TTA004?

TTC011B close to 2SC4793, and TTA006B close to 2SA1837

 

[Dibya]

TTC and TTA means not made in Japan , Coming from Toshiba contractor in China

Sound may not be same

 

[minek123]

2SC4883 are almost gone!

Now gone. Amazing how quickly this happened. I ordered 40 of them 1 hour ago...

 

[wg_ski]

I have a bag of about 40 NOS Toshiba 2SA1837. They are perhaps one of the best audio driver transistors ever made. Also gone the way of the dodo.

I bought 200 of each from Digikey, several years ago whe I realized that the **** was hitting the fan WRT driver transistors. The Sanyo parts acquired by ON soon followed. Lifetime quantities now in my inventory.

I am making a conspiracy theory , this is agenda by big corporation to kill Class AB to move us to Class D.

Well well that's a joke , hope Sanken/Onsemi/Toshiba doesn't takes it seriously.

It’s no joke. But Q is playing a joke on all of us “Good-bye Jean-Luc, all good transistors must come to an end”. When the pro audio industry finally abandons all class B on favor of D, at all power and price levels, even the ON MJ’s will dry up (and go thru the roof first). Anything “consumer” will go to chip amps as smaller and cheaper is the rule of the day. Anyone interested in high performance linear amplifiers should have already been buying up what they anticipate needing for the next few decades. I suspect that in 10 years most of it will be gone. I There may be additional ripple effects - even things like off the shelf transformers might start becoming unobtainium. When that happens you may want a stockpile of magnet wire and cores on hand unless you’re really comfortable building off-line SMPS’s or can afford to drop a few hundred on good reliable industrial or hospital-grade ones every time you need a power supply for something.