Batboard

Can a Spectra be converted to an Astro by replacing just the command with Astro board or does the control head also need to be changed. I picked up a working Astro Spectra board but does not seem to work when i installed it in the standard Spectra.
Thanks
Ralph.

You can make it work with the command board, vocoder and corresponding RF board as well as an astro control head and interconnect board. SG