[Yaesu] Fw: [OutpostPacket] Cable Wiring

[Dr. Gerald N. Johnson]

I'm afraid its not that simple. The radio is not ready for RS-232 
levels, its set up for TTL and data not inverted. Connection Rs-232 
direct can damage the radio. You need a level converter, like a MAX232 
in the circuit. There are other ways but that's the simpler one. There 
are cables available already made. TTL levels are +2 to 4 volts is a 
TRUE, less than 1 volt is a FALSE or Zero. RS 232 leves are -3 to -15 
for a MARK or TRUE, and +3 to +15 for a SPACE or FALSE. TTL logic can be 
destroyed with RS-232 levels and the inversion will prevent 
communications even if the logic survives. The PC hardware won't allow 
inverting the RS-232 levels, except by modifying a vintage RS-232 
interface to take out the level converters and to connect directly to 
TTL which is rarely done and is much harder to do with a USB to serial 
dongle.

http://www.g4hfq.co.uk/links.html has detailed information on cable 
sources plus the logic level converters in links. Sometimes I've found 
the CAT cables cheaper than the CT39A on epay.

73, Jerry, K0CQ

On 10/19/2012 9:55 PM, Ray Brown wrote:
>    I'm forwarding this message from another list. If anyone here has set up
> a FT8900 with Outpost (a packet BBS program), please reply directly
> to Ken at the address below. Please don't just hit Reply, he's not on this list.
>
>
>                  Ray, KB0STN
>
>
>
> ----- Original Message -----
> From: "caravanken"<kdavis24 at cox.net>
> To:<OutpostPacket at yahoogroups.com>
> Sent: Friday, October 19, 2012 5:21 PM
> Subject: [OutpostPacket] Cable Wiring
>
>
>> I am setting up my Yaesu FT8900 to run with AGWPC and Outpost
>> (without a TNC) and would like to know if anyone can help me determine the wiring pin outs.
>>
>> I have the CT-39 Yaesu 8 pin Data Cable that I need to install a DB-9 female connector.
>> This connector will go to a serial to USB converter due to the absence of serial ports
>> on my PC.  My Yaesu manual shows the wires from the radio but not sure which pins go to the DB-9 pins.
>>
>> Any help would be greatly appreciated.
>> Ken
>> W0KRD
>>
>