This a single end amp with one EL84 power tube. The preamp tube 12AX7 offers two amplification stages which give the amp a nice overdrive sound. The one part of the 12AX7 can alternatively be used as a tremolo oscillator.
 

Technical data:

Power: ~6W
Inputs:           1 x High and 1 x Low
Outputs: 8 Ohm
Controls: Volume, Tone, Tremolo speed/tremolo switch
Tubes:     1 or 2 x 12AX7, 1 x EL84
PT: 230V/250V/80mA/6,3V/2A
OT: 230/16V 8 Ohm
Speaker:  12" Eminence Guitar Legend/Red Fang
Schematics Rikstone C6 (without Tremolo)
Rikstone C6 (with Tremolo)
Rikstone C6 (with Tremolo, modified)
  Rikstone C6