[WriteLog] CW Keying Interface

Thu May 29 19:44:55 EDT 2003

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ドル if your order totals less than 25ドル 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???
---------------------------------
Do you Yahoo!?
Free online calendar with sync to Outlook(TM).