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Path: utzoo!linus!philabs!cmcl2!harvard!think!mit-eddie!GILLMANN@USC-ISIB.ARPA
From: GILLMANN@USC-ISIB.ARPA
Newsgroups: net.ham-radio.packet
Subject: Re: Icom 2AT PTT
Message-ID: <485@mit-eddie.UUCP>
Date: Mon, 18-Nov-85 15:45:02 EST
Article-I.D.: mit-eddi.485
Posted: Mon Nov 18 15:45:02 1985
Date-Received: Thu, 21-Nov-85 20:40:18 EST
Sender: daemon@mit-eddi.UUCP
Organization: MIT, Cambridge, MA
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From: Richard Gillmann <GILLMANN@USC-ISIB.ARPA>
Thanks for replying to my request for help.  I finally figured out
a circuit that works (with a little help from my friends).  To
connect an Icom 2AT to a TNC2 I just used a 33K ohm resistor
between the PTT line and the TX audio line.  It seems to work
fine.  The TNC2 uses an FET to key the PTT line and it already has
a blocking capacitor on the TX audio output.  I'm glad to hear
that you approve of the resistor approach, which I can say
after two days of use seems to work just fine.

73,
Richard N6MPP
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