[Ham-Mac] USB Serial adapters

[Chris Smolinski]

>I just added an iMac 400 MHz to my shack equipment and will use it to
>replace a PB1400.  OS is 10.3.9 and will probably not be upgraded to Tiger
>as it does not have a DVD drive.
>
>I plan to purchase a Keyspan USB to serial adapter for my TNC etc but would
>like some feedback on the Twin Serial adapter (RS422) vs the High Speed
>serial adapter (RS232).  I may also use it for rig control at some later
>date.

I have both adapters. The advantage of the high speed unit is it has 
a standard PC 9 pin serial port connector, with the extra handshake 
lines. I believe the voltage levels are higher as well, +/-12 volts 
not +/-5 volts like Mac style serial ports.

Keyspan USB/serial adapters work well. Stay away from the really 
cheap units. Avoid any that use the "Prolific" chipset, they are 
utter garbage.

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