> Hi Barry - I've built and use two different circuits for my 1000D, both
work
> equally well. The rig control (CAT) circuit came from QST for Jan. 1992,
> page 91. It's elegantly simple, I built it on perfboard in a DB25 female
> connector (you've probably seen pictures of that type of construction). It
> uses a MAX233 IC and a 7805 regulator for 5V. and that's all. Problem was,
> it didn't work until I called Yaesu and found out I needed a 2.7k resistor
> from pin 2 of the rig side (serial out) to ground. This one uses an
external
> 12 volt supply .
>
> The other one I use for FSK keying is from the ARRL publication "Personal
> Computers in the Ham Shack", page 5-21 if you have access to one.
> It uses a MAX231 and has a few more parts, but as I remember, it didn't
need
> the extra resistor (I could be wrong and could look if you opt for that
one).
> This one takes it's 12 volts to the regulator from the RTS pin of the
> computer. But I elected to use an external 12 volt supply since I used one
> on the other circuit anyway.
>
> The last one has the extra OPTIONAL transistor switch for connecting to
the
> radio CW key input that you described. I don't use the lead, it's just
> bundled and tied off. You could leave it out if you don't think you'll use
> it.
>
> You see lots of warnings to use opto-isolators for safety for rig level
> changing, but I could never get them to work with the 1000D. If you're
> careful in constructing them watch for potential shorts etc. you'll have
no
> problem.
>
> Hope I didn't bore you with all this.
>
> 73, Don W6FFH
> don.wsixffh@verizon.net
>
> ----- Original Message -----
> From: "Barry Kirkwood" <bjk@ihug.co.nz>
> To: <writelog@contesting.com>
> Sent: Wednesday, March 27, 2002 3:17 PM
> Subject: [WriteLog] Computer Radio Interface, Yaesu FT1000D : CW Keying
> line?
>
>
> > Am in the process of building an interface to allow Writelog to work
> between
> > my PC and my FT1000D.
> > I see some interface designs using a separate line from the DB25F plug
to
> > the CW key jack of the radio.
> > Yet the Yaesu interface shown in February 1993 QST (p.39) has no such
> line.
> > Can anyone kindly tell me more?
> > I am aware that interfaces can be bought at reasonable prices, but want
to
> > build one so as to learn a bit about digital electronics.
> > Thanks in advance,
> > 73
> > Barry
> > end
> > Barry Kirkwood PhD ZL1DD
> > Signal Hill Homestay
> > 66 Cory Road
> > Palm Beach
> > Waiheke Island 1240
> > NEW ZEALAND
> > www.waiheke.co.nz/signal.htm
> >
> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog@contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
>
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