I'm just about to build an interface and I've just read the readme that
comes with frgcntrl.exe (search for fgrcntrl.zip - lost the URL - june
download) it has a Max 232 based circuit in it with a disclaimer of "I
will not give any guarantee that it will work and
that it does not damage any hardware."

The comments include:

- capacitors could be 22 uF / 16V tantal,
the c. at the output of the 78L05 100 uF,
watch for correct polarity !

- pins 7-8 and 9-10 of the MAX-232 could be connected pairwise

- for the YAESU FRG-100: connect pin 11 of the MAX-232
with a resistor of 5k6 to the ground or you will not
be able to receive data from the FRG-100 !

- I had to connect pins 4-5-8 together, and pin 6 to pin 20 on
the D-25 plug, to make it work with my RS232 port. I don't have
the pinout for the D-9 version of the RS232 plug, but it should
not be very difficult to get that info.

Appreciate an update
Peter K

"Birderman" wrote in message
...
Hi,

Being a newbie to SWL I have Yaesu FRG100 receiver that I wish to control
via CAT interface from my PC.

I have built a CAT control interface based on a Max232 from a circuit
found
on the internet and using trial version of FTBasic, I do not seem to be
able
to get it to work, has anybody any experience of this and how to get it
working. My OS is Windows XP, do I require an older OS to make the serial
comms work ?

Is there a way of checking that the serial comms are working, ie can I
check
that when FTBasic sends as a signal to the com port its actual getting
there
an out of the port ?

As an alternative can anyone suggest suitable software and interface
circuit
details that are known to work with Windows XP.


TIA
Birderman