[sdiy] parts numbering

[Steve Lenham]

I believe they are Siliconix parts (now owned by Vishay). Data at:

http://www.vishay.com/company/brands/siliconix/

The J201 is still listed and, though I couldn't find the E402, they 
definitely still produce dual JFETs. Try the U404 or U440 - I successfully 
used these in a stereo broadcast limiter.

Cheers,

Steve L.

----- Original Message ----- 
From: "Roy J. Tellason" <rtellason at blazenet.net>
To: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, June 26, 2005 9:06 PM
Subject: [sdiy] parts numbering


> Somebody posted in here a bit earlier abotu Tillman's pages,  and I'm 
> looking
> around over there.  His guitar amp circuit specifies a FET with the number
> J201.  Reminds me of one I ran across in some synth or other that was a 
> dual,
> E402?
>
> Anyhow,  my question is,  whose numbering system is this?  Who made these
> parts,  originally?
>
> A source of datasheets would be welcomed too.
>