One of my favorite companies, Mini-Circuits, developed a (really!) low-noise, broad band, preamp (model PSA4-5043+) earlier this year for use as a front-end amplifier for mobile telecom applications, ...

New Dual-Band, Bidirectional Mobile Amplifier Now Available in Four Configurations to Enhance Mobile Phone and Data Card Performance, Delivering Unmatched Coverage and Reliability Wilson Electronics, ...

Parasound is now shipping its John Curl designed Halo JC 3 Phono Preamplifier, a high-performance dual-mono phono preamp built with high quality parts, solid construction, and a very clean design.