[Ham-Mac] USB Serial adapters

[Chris Smolinski]

>On Jun 23, 2005, at 11:05 AM, Chris Smolinski wrote:
>
>>The problem is that some PC devices (like the early RigBlasters, 
>>maybe even the current ones?) were not happy wiith the +/- 5 volt 
>>output from a Mac serial port, they expected the +/- 12 volt 
>>outputs common on PCs.
>
>Technically, though, they should be satisfied with +/- 5 volts. The 
>RS-232 spec says anything in a range of + / 3-25 volts is valid.

Completely correct. However, they were most likely designed by peecee 
weenies ;-)

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Chris Smolinski
Black Cat Systems
http://www.blackcatsystems.com