Re: Re: (unknown)

On 15 Jan 2012 at 10:28, ebel0410 wrote:

> DIY Null modem cable.
> Assuming plug A to be the rig end of the cable: 
> 
> plug A pin 2 connected to plug B pin 3
> plug A pin 3 connected to plug B pin 2
> plug A pin 5 connected to plug B system ground (pin 5 for a 9 pin plug, or pin 7 for a 25
> pin plug).

The above isn't quite right if it's trying to include a 9 pin to 25 pin
cable (as 
suggested by the third connection).   
If you're trying to make a 25 pin to 9 pin cable, you have to change
the first two 
connections too, since the RX/TX are reversed on 9 vs 25 pin cables. 
Ie you'd have 
2-2
3-3
5-7

These aren't tru null modems, but they do work with the VR5000. I just
call them 
reversing cables so as not to be confused with the null modem cables
that have other 
handshaking lines that aren't used for much these days. 

 


Bill Jones         N3JLQ
Sweden Maine
[email protected]
http://www.megalink.net/~wejones 
 
303rdBG page 
http://www.eskerridge.com/bj/303rdbg/wwii.html