Communications Support Forums

I am looking for the information on having an 800 radio "brick" and a VHF radio "brick" in my vehicle with a SINGLE O5 control head to operate both radios. I know there was a way to do this with to older Astro Spectra 110Watt radios using a special "Y" cable and a W3 head. Any information would be greatly appreciated.

RSS_Image.jpg
I found this in the CPS, but it is grayed out. Also under help, it states that it will only work with W3 head.. Quite interesting..