Good reading. I think it will be a while before SDR matches that performance but it does do very well processing the IF. fc
Giancarlo <[EMAIL PROTECTED]> wrote: Yes, again about the H-Mode Mixer but this time A High Dynamic Range Front-End by Martein Bakker, PA3AKE. Martein has just released a complete update of his High performance Down Conversion Front-End design based on the G3SBI H-Mode Mixer. All the information and measurements from 160m to 6m are reported. With a very extensive serial of additional comments. This is not "ham poetry" but real stuff as you can see pictures of the front end unit, from input band pass filters to the roofing IF filter. We can see how we can achieve >120dB of dynamic range on 40m SSB bandwidth with no special surplus or very expensive components. There is a lot to read also for those that visited in the past PA3AKE web page: http://www.xs4all.nl/~martein/pa3ake/hmode/index.html 73 Gian I7SWX
