I am doing some shack cleaning. This unit was originally sold by Am-Comm. Since then, the basic electronics have been repackaged, sometimes combined with a speaker, and sold by various companies. My experience is that most of the time it is amazing, though rarely it does very little. The exact improvement depends on the signal, type of noise, levels, etc. It made the difference on AO-40 around apogee.
http://www.eham.net/reviews/detail/1041 Currently West Mountain Radio is selling a similar unit, with an adjustable threshold added: http://www.westmountainradio.com/product_info.php?products_id=clr_dsp The unit is perfect mechanically and electrically. $80 including shipping in North America. Please contact me off list. Alan WA4SCA _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb