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 Forum index » DIY Hardware and Software
Where have all the JFET Transistors gone ?
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ryktnk



Joined: Apr 24, 2008
Posts: 196
Location: london
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PostPosted: Tue May 13, 2014 12:23 pm    Post subject:  Where have all the JFET Transistors gone ? Reply with quote  Mark this post and the followings unread

Hello

Sorry if I missed something, but whilst I was out . . .

Just logged into RS Components to stock up on some 2N3819s
and they appear to be discontinued !

Same at Rapid Electronics, oh dear.
RS are only showing 1 non SMD FET transistor [ 2n4393 ]

Any thoughts on non SMD 2N3819 replacements ?

Worried
-ryk
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AndyR1960



Joined: Feb 16, 2007
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Location: Manchester UK
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PostPosted: Wed May 14, 2014 9:47 am    Post subject: Reply with quote  Mark this post and the followings unread

I guess it depends what you're using them for. I've subbed 5459's for them in the occasional S&H circuit (watch the pin-out)... seems to work fine.

I noticed several years ago that 2N5457/9s were becoming scarce - So I bought a hundred of each while I could.

Glad I did now.
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ryktnk



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PostPosted: Wed May 14, 2014 12:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

AndyR1960 wrote:
I guess it depends what you're using them for. I've subbed 5459's for them in the occasional S&H circuit (watch the pin-out)... seems to work fine.

I noticed several years ago that 2N5457/9s were becoming scarce - So I bought a hundred of each while I could.

Glad I did now.


Hello

Thanks for the tip, but if the substitute is also
scarce then I am still worried.
Mainly used for S&H in my sequencer module.
But also getting into the idea of making an
FET based phaser.

-ryk
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steffensen



Joined: Jul 11, 2012
Posts: 95
Location: Sweden

PostPosted: Thu May 15, 2014 1:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, this is really annoying. I figured i was gonna try using the SMD version of the 2N5459's as they were a lot easier (and cheaper) to source. But now i discover they are starting to be scarce too.
Havent found anything else that works as good as the 5459's as of yet (been trying lots of subs for it), so yea, i feel bullied.
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analog_backlash



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PostPosted: Thu May 15, 2014 5:25 am    Post subject: Reply with quote  Mark this post and the followings unread

AndyR1960 wrote:
I noticed several years ago that 2N5457/9s were becoming scarce - So I bought a hundred of each while I could.

Glad I did now.

Ditto (Well, 2N5457/8 in my case). They are still available (at a price). The cheapest I've seen are from Tayda, but they're out of stock now (surprise, surprise). I cannot vouch for their quality, but I've not had a problem with other Tayda components (so far). A much more expensive source that I know is Cricklewood Electronics. I've bought obsolete components from them before and again they've been OK.

Gary.

http://www.taydaelectronics.com/

http://www.cricklewoodelectronics.com/Cricklewood/home.php
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mrmrshoes



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PostPosted: Thu May 15, 2014 5:49 am    Post subject: Reply with quote  Mark this post and the followings unread

I've just stocked up on 50 2n3819 from mouser, cost about £25 ex VAT
http://uk.mouser.com/Search/Refine.aspx?Keyword=2N3819
they is still a decent stock 11000+

mouser seem to be the only major supplier with jfet stock. i hate it when through hole parts go out of production.
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ryktnk



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PostPosted: Thu May 15, 2014 12:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello

Thanks for the tips guys.

Looks like Mouser is the way to go !

-ryk
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