[WriteLog] CW Keying Interface

[Bryan Swadener]

Lee,

Yes that will work though, you won't realize any isolation, since the grounds for the radio and computer would be tied together. I recommend using some kind of opto-isolator.  The 4N33 is a darlington output device but I'm thinking you could use some other type. Unfortunately, "that national chain store" no longer handles any optocouplers.  However, Digi-Key shows various versions available.  They will ding you an extra $5 if your order totals less than $25 but, they have 'em... got anything else on your wishlist?

If that's all you need/want, I have a dozen or so 4N33s in my parts box.  I don't mind slipping one to you in the mail... my fee is a lot lower (one 807)! :^)

Bryan, WA7PRC

From: Lee Buller (k0wa at swbell.net)
Subject: [WriteLog] CW Keying Interface

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???


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