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[Yaesu] Building a CAT interface

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Subject: [Yaesu] Building a CAT interface
From: lanej@provide.net (John Lane)
Date: Sun, 31 Jan 1999 11:53:13 -0000

The 757 needs TTL logic level inputs for it's CATt interface.  I built an
interface using the Maxim MAX232 chip.  A very simple arrangement.  I
believe there was an article in QST a few years back or you can request the
design notes from Maxim for sample circuits.  (A very good company BTW.)

>I have a 757GX, and would like to know if it is possibile to build a CAT
>interface for the radio?  I believe my radio has three pins coming out the
>back - are these simply RS-232 send, receive, and ground pins?
>73 and thanks - Matt
>Matt Werner, KB0KQA
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