Single Transistor LNA for HF

Note: This HF LNA design is inspired by Charlie Morris ZL2CTM's prior work. The idea that a single-transistor-preamp with 10 dB gain is more than enough for HF comes from Gajendra Kumar (VU2BGS). As a new "designer" I am often overwhelmed by the different possible design paths - so having guidance from an elmer becomes crucial. It seems even MMBT2222A should work for building a HF LNA! ...

September 21, 2025 · 1 min · 94 words · Dhiru Kholia