This is a single-end amp with EL84 using one EF86 as a preamp. The cabinet is 18 mm pine covered with black vinyl. The sound is smooth and clean.

Technical data:

Power:        ~5W
Inputs: 1 x High and 1 x Low
Outputs: 16 and 8 Ohm
Controls: Volume, Bass, Treble
Tubes: 1 x EF86, 1 x EL84
PT: 230V/230V/120mA/6,3V/2A
OT: Hammond 125CSE
Rectifier: 4 diodes
Speaker: 10" Weber Classic Alnico
Schematic: Rikstone C5
Rikstone C5 one input version
  Rikstone C5 double tube power amp
3W version: Power Supply based on 5E3
  Circuit based on 5E3
One input
version: Picture (face plate)
Picture (back plate)
Picture (inside)
Picture (open back)
Picture (chassis installed)
Picture (back)
Picture (front)
Picture (top)