Sounds good! Samples on order!

Harold


>> Sounds interesting. Neither Fairchild or National have data on the
>> 2N5951.
>> Sounds like your setting Vgs to zero, right? That then results in 8mA?
>> Over what voltage range?
>
> Hi Harold,
>
> Here's a link to some minimal 2N5951 data:
> http://www.jameco.com/Jameco/Products/ProdDS/38527.pdf
>
> Tie gate to either source or drain, JFETs don't really care, then just
> treat it like a two-terminal device and put it in series with your LED. 8
> mA is reached pretty quickly - the jfet has its on-resistance of about 100
> ohms.
>
> So your LED acts like it has a small resistor in series, until the point
> the jfet starts to current limit(it's up to about 200 ohms with a volt
> across it).
>
> Current after that is solid at 8mA until I ran out of power supply at 15
> volts.
>
> I'm sure there are lots of jfets that would work, I only had two types on
> hand to test.
>
> If I had to guess, I'd bet the 2SK30A would work really well, but almost
> all my analog stuff like that is in storage.
>
> Cheers,
>
> Bob
>
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