[sdiy] Dual NPN transistors

[RFAHL]

Hello Osamu,

That's good to know.  I just checked and 2SC3381s are available from Mouser
($1.41) and MCM ($1.28) in the US.

2SC1583s are still available here, MCM has them for $.95

What's a good sub for the 2SA798?  They're still available in the US, but I
suspect that supplies are limited.

Romeo

on 4/17/01 6:52 PM, houshu at dsp.cl.nec.co.jp at houshu at dsp.cl.nec.co.jp
wrote:

> Hello Neil,
> 
> About 20 years ago, I used 2SC2259 for 2SC1583 in exp converter, and
> had no trouble.  Both were produced by Mitsubishi, but are now
> discontinued and rare even in Japan.
> 
> 2SC2259 is for higher voltage applications.  It has smaller hfe (about
> 100) than 2SC1583 (usually over 200).  When I can get 1583, I'd not
> use 2259.
> 
> In Japan, 2SC3381 (Toshiba) is popular for new disign.
> 
> http://www.semicon.toshiba.co.jp/seek/us/td/99kataban/20014.htm
> 
> It is in production, and its hfe is high.  Because terminals are
> separate, it can be used not only for exp converter but for transistor
> ladder.  By bending pins, it'll fit pcbs for 2SC1583.
> 
> Regards,
> 
> Osamu Hoshuyama
> 
>> Date:    Tue, 17 Apr 2001 12:55:50 JST
>> To:      synth-diy <synth-diy at node12b53.a2000.nl>
>> 
>> While designing the expo for my little VCO I'm looking at using a dual NPN
>> device, like the 2SC1583.  I've also come across the 2SC2259 as an
>> "equivalent".  Anyone come across this device??  Does anyone have other
>> equivalents??
>> 
>> Browsing the around the web they both seem quite cheap, with the 2SC2259
>> possibly being *slightly* cheaper.  Although I think the 2SC2259 is a
>> discontinued part, unless someone knows otherwise.
>> 
>> Also found another, possibly useful, equivalents site:
>> 
>> http://elektronline.hypermart.net/xref/kereso.htm
>> 
>> It's in Hungarian (I think) but that doesn't detract from the information
>> contained within.  Seems quite comprehensive too.
>> 
>> Cheers,
>> Neil
>> 
>> --
>> Neil Johnson :: Computer Laboratory :: University of Cambridge ::
>> http://www.cl.cam.ac.uk/~nej22           +44 (0) 1223 334 477
> - -- ---- ----------- --- --- - ----- -- --- --- - - ------ - - - --
> Osamu HOSHUYAMA                    NEC Corporation  Kawasaki JAPAN
> --------------------------------------------------------------------
>