WriteLog
[Top] [All Lists]

[WriteLog] CW Keying Interface

To: <writelog@contesting.com>
Subject: [WriteLog] CW Keying Interface
From: bswadener@yahoo.com (Bryan Swadener)
Date: Thu May 29 14:55:36 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 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@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???
 
Lee - K0WA


---------------------------------
Do you Yahoo!?
Free online calendar with sync to Outlook(TM).
<Prev in Thread] Current Thread [Next in Thread>