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[WriteLog] CW PTT troubles

To: <writelog@contesting.com>
Subject: [WriteLog] CW PTT troubles
From: jjreisert@alum.mit.edu (Jim Reisert AD1C)
Date: Thu, 14 Nov 2002 20:00:34 -0500
At 11:14 AM 11/14/2002 -0500, Barry N1EU wrote:

>Not to ask the obvious, but if you're using a modern rig, why not use 
>break-in and just let the keying line switch rx to xmit ?

The rig could switch before the AMP, then you're hot-switching the amp when 
it finally PTTs.

CT prevent this by asserting PTT on an external LPT pin one baud before it 
sends any CW.  This gives all the equipment time to switch before there is 
any RF.

73 - Jim AD1C


-- 
Jim Reisert AD1C, 7 Charlemont Court, North Chelmsford, MA 01863
USA +978-251-9933, <jjreisert@alum.mit.edu>, http://www.ad1c.com
PGP Fingerprint: D8E2 3D78 339F A7F1 8C13  1193 B5D1 4FB6 79D1 70DC


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