HELP!!! JP PROPO X-347 - Any insight would be helpful!

[The Digitalman]

Hi all,
I guess my eyes are about as glazed over as the icon character I've picked. I have a JR PROPO X-347 TX that I am trying to get functioning with FMS. I must say with what little interaction I've had via the keyboard, hats off to the authors, so far. Here is where I am at... I am using Windows XP Professional. I have built Mike Robert’s FMS Serial Port Circuit which was "Modified for JR Transmitters". I have disabled PCM mode via the controller’s computer and enabled PPM, and still nothing... NO MOVING BARS!!! I have been over the circuit over a dozen times; I have swapped the diode’s cathode direction once. I used Mike Robert's JR troubleshooting guide on his website. I am getting an 11.73v w/o the TX and a 9.25v with the TX connected! Transmitter test numbers are: a fluctuating -.162mV DC Test (which will go positive depending on how I place my test leads) and .226V AC test. I am using the NTE123AP for the BC547, NTE159 for the BC557, and a NTE519 for the 1N4148 diode. Resistors 1/8 watt and are:
R1 = 10k
R2 = 470k
R3 = 22k
R4 = 22k
R5 = 5.6k

Is a Serial PICS interface even compatible with the JR X-347? Has anyone with an X347 had any success? If anyone has any insight please share your experience with me. I'm almost at the point of buying ( :angry: gasp! :angry: ) a commercial package!!

Thanks in advance...
The Digitalman

[Steve Lewin]

You appear to have built Mike's simple serial port interface instead of the Serial PIC version. These interfaces work well with Win 95/98/ME but do not work at all with Windows XP.

You need the one based on a PIC microcontroller, which Mike or several other people could sell you. Or you can build your own if you are able to program microcontrollers, the circuit and firmware you need is in the FMS documentation files.

Steve

[Mike Roberts]

Thanks Steve - you beat me to it!

Mike