Reading an article about the first transistorized Hi-Fi amplifier ... clear, stereo sound. This isn’t the first Radio Shack kit that [Netzener] has adapted. Check out his single tube radio ...

First made in 1959, this is the best-selling tube amplifier ... new company’s amplifiers. Uniquely, Dynaco sold its ...

The 6J1 seems to be ubiquitous throughout the Chinese kits, which is surprising when you understand that it’s not an audio tube at all. Instead it’s a small-signal VHF amplifier, a rough ...