Thanks for the suggestions. I'm reluctant to use the computer as I'm on
solar power and can't use the machine for too long, particularly on
cloudy days in winter - such as today.
I do have some DSP stuff though - ADSP2100- but as it's fixed point, I'm
not sure if it has the precision needed.
I really want to use this an exciter and while filters are probably
easier, the phasing method always struck me as more "elegant".
73s
Alan