[Ham-Mac] Need Ideas on USB-Serial Problems

[Steve Muncy]

Hi, David....

Unfortunately I don't have a RS-232 test dongle, but I'm darn sure  
thinking about acquiring one now!!!

I tried using a Belkin USB hub last year and gave up in disgust. The  
Keyspan converters just didn't like it, so I started plugging in the  
converters to the back of the  iMac last year and they worked  
perfectly until this latest switchover. I'm thrilled to know that Don  
Agro has had some good experiences with recent ones, however, and will  
give those a try after (if) I get this system working again.

I've received a few comments direct that indicate some people may have  
been confused over some aspects of my problem, so I'll summarize:

- I don't blame the software since I know it works;
- I don't blame Leopard because this doesn't work using 10.3.9 on  
another system;
- I don't blame the cables because they work fine with my TNC;
- I don't blame the Keyspan converters because all three of them work  
with the TNC;
- I don't blame the iMac since I now have the same problem on a  
PowerBook.

The only thing that seems common to everthing is the Keyspan drivers,  
but I don't think I can blame them because others are using them  
successfully in the same configurations as mine.

I'm running out of things to blame!!!   ;-)


Steve, NI5V
ni5v at arrl.net


On Dec 15, 2007, at 3:14 PM, David Anderson GM4JJJ wrote:

> What version of Keyspan driver are you using?
>
> I'm using an Intel Mac with 10.5.1 and Keyspan 2.4 and I can  
> communicate between a dual Keyspan adaptor USA-28X and everything I  
> have hooked up including a Spid Rotator and MacDopper. Have you an  
> RS-232 LED test dongle that you can put in line and see if data is  
> being sent and received?
>
> I have had odd problems, but that was when I was using a USB hub and  
> the Keyspan, then sometimes the ports didn't get detected.
>
> 73
> ___________________________________________________________________________
> David Anderson, GM4JJJ         E-mail: david at gm4jjj.co.uk