Check out the N2PK VNA, MORE than 120 dB DR thanks to innovative design and
engineering, and meticulous documentation. Half the price, twice the DR of
brand X, and MORE! A lab in a box.

www.N2PK.com

For a homebrew SA, DC to a GHz, more using Alias's.

http://groups.yahoo.com/group/spectrumanalyzer/

W4ZCB