Ten-Tec Model 257 talking voice board.
It works on the Omni 5, all the Omni 6 transceivers. I used to run the Omni
6 plus which is a very good radio but now use the 590. I have two of the
boards which are plug in and go type and will sell them for 70.00 dollars
each including shipping in Conus They have not been built for many years
but there is a lot of the rigs around and if one of the gang could get their
hands on one of them they would like the rig I think. contact me by e-mail
in interested. 73
ED K7UC