50-MHz RX LNA (Day 2)

May 1st, 2010 by k8gu Leave a reply »

Built a little low-noise amplifier for the RX converter today using one of the BF981s I received the other day.  The design is based on the dual-gate MOSFET VHF preamp in the 1993 ARRL Handbook.  My local noise level was too high to credibly optimize the match on the beacon alone.  But, it did improve my ability to hear it on the 10-meter dipole.