http://www.fairchildsemi.com/pf/4N/4N33.html
http://www.futurlec.com/LED/4N33pr.shtml
They are still available.
73 Bob WA6BOB
Bob Foster wrote:
> Hi All,
>
> The 4N33 is discontinued. The 4N35 is still made by Fairchild, Toshiba and
> Vishay.
> Newer optoisolators are NTE3220, NTE3221, CNC1S171, and ON3172 (that's
> Oh-N, not zero-N). All these optoisolators should work OK. Most have same
> pin connections as 4N33, but check to be sure.
>
> Hope this helps!
>
> 73, Bob, K3QIA
>
> Lee Buller wrote:
> >
> > OK, just need some comfirmation....
> >
> > I decided to build a keying interface for WriteLog, but I cannot find a
> > 4N33 anywhere. Radio Shack does not carry them any more. Really! I even
> > looked on the Web too.
> >
> > So, I reverted back to previous setup and a different program. Will this
> > work? Use a 2N2222. From Serial Port Pin 4 to a 1K resistor to the base
> > of the 2N2222. The emitter is hooked to Pin 5 and the collector and
> > emitter are used to key the rig.
> >
> > That should work with WriteLog??? Right???
> >
> > Lee - K0WA
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog@contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
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