Point-to-point construction method Point-to-point construction method Ground Bus Bus starts from the first PSU capacitor Ground Bus near input RCA jacks Bus grounded to the chassis at one end

Internal Construction

All inductors and tube sockets were mounted to the top plate of the chassis. Their wires were led through holes to interior. The wires of components were looped through the terminals and soldered to them. I have used classical point-to-point construction method. This is the best and easy-to-service method from all I know. For point-to-point connectors I used classical terminal strips with tin plated lugs and bakelite insulators. All parts were mounted by passing through their leads around lugs and soldering. I am not a professional electronics assembler, but I tried to work neatly and carefully one every single node.

The basis for the wiring design was to lay out the ground bus. The ground organization, in my opinion, is the main point after schematic calculation. A bus wire goes from one end of the circuit (it starts from the ground end of the first PSU capacitor) to the other, and is grounded to the chassis at one end (near input RCA sockets). I wired all stages components connected together that then go to the bus (like mini-star ground principle). This gives three basic properties on the bus wire:

  • power transformer secondary center-tap, the ground end of the first filter cap and wire from the output jack
    (both channels with one wire)
  • ground for output stages
  • ground for input stages & ground of input level pots chassis in the same point

Try to keep to the grounding method I mentioned in this construction.


Level Five 2A3 Schematic