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

Steve Muncy smuncy at mac.com
Sat Dec 15 20:41:57 EST 2007


Doesn't sound dumb at all....because I HAVE done dumber stuff. However  
in this case, the cables haven't changed since I started using them  
several years ago. (I MARK then because I HAVE plugged the wrongs  
one's into the wrong places on occasion.)  ;-)

As of now, all three of the serial converters work great with a TNC  
sending/receiving to the TNC without any problems at all.... it's when  
I try to communicate with a radio that the problem starts.



Steve, NI5V



On Dec 15, 2007, at 5:58 PM, Jack Brindle wrote:

> This is a shot in the dark, and may sound dumb, but...
>
> Are you sure you are using the right cables? They might work great  
> with a modem, but maybe they need to be straight through?
>
> This really sounds like a problem between the serial adapter and the  
> radio(s).
>
>
> On Dec 15, 2007, at 2:56 PM, Steve Muncy wrote:
>
>> 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
>>
>>
>>
>>
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>
>
> -Jack Brindle, W6FB
> = 
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