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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