Ameritron AL-1200 to GS35B Conversion The Ameritron AL-1200 Amplifier is in current production. In its factory configuration it uses a single 3CX1200A7 (triode)  tube, grounded grid configuration. Some of the nice features of this amplifier include; Peter Dahl transformer Pi-L output circuit Full 160m-10m coverage Large chassis with accessible components Some of the ‘Russian tubes’ …