[CQ-Contest] Re: TS-850 Computer Interface

[dr]

Kenwood produced the IF-232 interface box to interface the TS-850 and other
rigs to a computers RS-232 serial interface.

There is another very similar "Kenwood-to-PC Interface" circuit available at
http://www.jps.net/k6xx/radio/pctsinfc.pdf

Best Regards,

Dave KG0US

k8cc wrote:

> At 08:35 AM 7/6/01 +0000, Dave Hachadorian wrote:
> >You don't need the Kenwood RS-232 Interface to hook it up to a
> >computer, just a very simple passive circuit. A diagram can be
> >found at:
> >
> >http://www.qth.com/ka9fox/ts850_mods.txt
>
> While down at WP3X in 1998, W0GJ and built up this circuit for use with our
> TS-850s.  In neither case did it work.
>
> Down in Puerto Rico we lacked the test equipment to get to the root of the
> problem.  However, my suspicion is that it had something to do with the
> laptop computers we were trying to make it work with.  I have found that
> the serial ports in some laptops are not capable of driving much of a load
> on the port lines without the voltage dropping too low.  For example, the
> MFJ 1683 RS-232 interface (available pre-wired for ICOM, KENWOOD, or YAESU)
> is powered from the serial port control lines.  This interface will not
> work with my Dell Inspiron 3000 laptop because the port lines drop too low
> under the loading.  This same interface works fine on a desktop computer.
>
> I'm not saying to not perhaps try the the circuit referred by
> K6LL.  However, because it has no active devices, keep in mind that it
> might not work.
>
> 73,
>
> Dave/K8CC
>
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