Some details about components used in the schematic:

 
C5,C7,C8   200V or more
All other caps can be low voltage (16V or more)
 
R9 1/2W
R31 2W
R32 2W
All other resistors 1/4W
 
Coil L1 is 20mm diam, from 10 turns
  2mm diam copper wire => 20mm length as well