I'm passing this info along because I thought it was important for the group
(and before someone damages the radio they worked so hard for). The below
email was a response from an ICOM tech after an amateur op inquired about
the performance of the 746 and 746 Pro on 60 meters. Take the info for what
its worth.

73 de Paul

Good Morning....

Thanks for your e-mail.

The 746 final PA band pass filters were never designed to support operation
outside of the amateur radio bands. They will "stretch" to accept normal
operation in the MARS and CAP frequencies just above and just below the
amateur radio spectrum, but they will not support operation down in the 5
MHz area. They will heat up and you will damage the radio. About the only
two radios will have reasonable operation on the 5 MHz area are the 706MkIIG
and the 718.

Best Regards;

Mike Hilton

Technical Support Representative

ICOM America, Inc.

2380 116th Ave. NE

Bellevue, WA 98004

Ph. (425) 454-7619

Fax (425) 637-8417

www.icomamerica.com