Hi Dave, QRZ is showing W5HRF as silent key. How did he sound tonight? ...😉 de kn7sfz > > With a properly matched speaker, the RU will > output plenty of excellent audio with B+ below 100V. > Here's W5HRF on 3880 this evening, with RX B+ 90V: > https://photos.app.goo.gl/4uQZxoQhFQuEYPuP6 > > GL OM ES 73 DE Dave AB5S > >