David Kearns Near Chippenham Wiltshire demonstrates his 50 and 70MHz homebrew SSB transceiver with SDR output.
This is his homebrew Six & Four Metre transceiver. Here working a station during a Four Metre, 70MHz contest. The rig has an SDR output. which can be seen driving #SDR. It has an output of 2 Watts which is enough to drive the homebrew amplifier to 125Watts. Power out on Six is 10Watts which give me 150Watts out of the Six Metre amp.More on his website, search G8TTI