Due to the unavailability of some through hole components, this project is now obsolete, but is still published so that those who built it (around 800 people) have a hard record of technical details for reference.

  • Full Assembly Instructions for the project.

    Two photos showing the front and back of the main PCB when the Connector PCB has been attached with solder.

  • Main PCB Top
  • Main PCB Bottom

    Using the Main PCB to drill the box lid.......... Note the careful centralising of the PCB, both horizontally and vertically, achieved by using the ridges provided just inside the edge of the box lid.

  • Lid Drilling

    Using the Front Panel to Mark out the LCD Hole and 2 switch holes in the box lid.........Use the hole previously drilled in the lid top for the rotary switch shaft to accurately position the front panel.

  • Marking Out the LCD and switch holes

    Attaching The LCD to the main PCB..........This is the simplest way, but plugs and sockets are another method which can be used by constructors. Note the clip-on spacer on the front of the LCD, which ensures the LCD sits flat against the rear of the box lid. Also note the elephant hide insulation behind the LCD, ensuring that no contact can be made with the main pcb rear.

  • Attaching the LCD

    An internal view of the completed analyser

  • Internal View


  • Colour Codes for Radio Frequency pdf format
  • Full Diagnostic pdf format
  • Substituting a Picaxe 28X2 for the 16F873A processor supplied with the kit -So you can play with the code :-)
  • Meter Scales for a 91C4 meter movement for the optional Z meter... in pdf format
  • A printer friendly X-Ray view of the main printed circuit board in pdf format.... . with thanks to John VK5DM alias VK3IC :-). Note that ground connections are not shown as reproduction of the board ground plane renders the diagram unuseable
  • A printer friendly X-Ray view of the main pcb in pdf format showing component identifiers (R3, L2, C1, D2 etc) ......with thanks to John Hutchinson
  • A view of the analyser with the optional impedance meter fitted into a UB5 Jiffy box
  • Simplifying the wiring between the LCD and Main PCB- Thanks to JA1FRQ :-)