1977: I built these two ham receivers after a couple of articles in QST. The radio on the left is the 20M "Africa" receiver, and the one on the right is the Herring-Aid 5, which I mounted on a canned ham can so it would be a "ham radio." The Africa receiver works very well and I still have it; the Herring Aid was a disaster and I scrapped it when we left Rochester in 1985.