David: The Gonset Commander "Model B" used a pair of 7C5's to modulate a 6146 PA. A 12AT7 was used as an audio driver. Transmitter measures 5 3/8" x 8 1/8" x 7 1/8". Bandswitching was accomplished by a plugin tank coil. Cute little rig.... Have seen several Commanders, no Commander II's. Hope this helps. Jim Gantner K4GT