Hi Tony, I spoke to Andy SZM earlier, he was quite pleased that others were interested in modifying PMR gear, and that the fact that an Icom D-Star box is just two FM trancievers in a shiny case, obviously with no analogue whatsoever available on them to the end user is just that. GMSK can be broadcast over whatever mode you want, (look at the AOR equipment,) the fact we are all using simple plain old FM to carry it is the main point he made.
I must admit, the audio quality from the FX5000 modded on GMSK seems much more natural and responsive, the FEC seems to pick up quite fast after a drop out, resulting in less R2D2 and more actual voice heard than that on an Icom box in the same circumstances. Its a shame your TX is what it is, maybe a redundant FM TX rig would suffice instead? (And be a quick fix.) 73 de Neil, G7EBY. --- In [email protected], Tony Langdon <vk3...@...> wrote: > > At 04:04 PM 7/3/2009, you wrote: > >Have a read of Andy, G4SZM's work here: > > > ><http://www.gb3we.com/gb3we/pages/> > > > >The pictures page shows you the modifications to make an analogue > >repeater work on D-Star. > ><http://www.gb3we.com/gb3we/pages/> > > > >There are a couple over in Ireland using this info to good effect. :) > > Unfortunately, I have to do some major surgery on my repeater, > because the Tx is phase modulated, which won't pass GMSK. :( There > are some "true FM" mods for the transmitter I am using. As I said, > some surgery required. :D > > 73 de VK3JED / VK3IRL > http://vkradio.com >
