The solid state and tube versions of the Vox Pacemaker had similar control panels and features. The V-2 tube Pacemaker is shown in the upper picture, the solid state Pacemaker control panel is shown beneath the tube model.
The Pacemaker amp had a single channel with three 1/4" inputs and tremolo. The tube Pacemaker differed by adding a standby provision to the power switch and a rectangular frame around each of the control names on the upper control panel. Later versions of the solid state Pacemaker amp added an "E-Tuner" function to the lower control panel of the amp.