> Has anyone used the following modules, or anything similar, with a PIC?
>
> http://www.maplin.co.uk/module.aspx?ModuleNo=22965&doy=12m5

Yes. I use the Keymark equivalent, Manchester encoded data between
PICs, 200m line-of-sight with simple 1/4 wave aerials

I was intending to write it up shortly as a PIClist page, but I can give you
details now if you want

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