From the manual:

Connect your primary HF/ 50 MHz antenna feed line to ANT 1 on the rear 
of the
transceiver. If you are using two HF/ 50 MHz antennas, connect the secondary
antenna to ANT 2. Refer to page 9 for the location of the antenna 
connectors.

******

Ant 1 is the inboard connector and has a single raised bump next to it. 
  Ant 2 is the outboard connector and has 2 raised bumps.

You can do HF or 6 meters on either connector.   I don't remember for 
sure, but I think HF defaults to ant 1 and 6 meters to ant 2.    Either 
way, you can select which bands  are on what antenna connector, and the 
radio will remember.

If using an external tuner, it needs to be on ant 1.

73, Steve KW3A



On 1/4/2015 12:00 PM, Eric Clegg wrote:
> Hello listers,
>
> I notice that the 590 has two antenna ports on the back panel designated
> antenna 1 and antenna 2.
>
>
>
> I understand that antenna 1 is the main transceiver antenna.
>
>
>
> What antenna port is used for six meters?
>
>
>
> Does the second antenna port work for six meters?
>
>
>
> My 480 had two antenna pigtails one for all the hf bands and the other for
> six meters.
>
>
>
> I've looked in all the manual related materials I have including tutorials
> and can't seem to find the answer.
>
>
>
> Thanks for the  help
>
>
>
> Eric
>
> KU3I
>
>
>
>
>