[WriteLog] 4N33 INFO

[John Orton WA6BOB]

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
> >
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