https://www.lostretrotapes.com/building-a-new-zx-spectrum-from-all-new-parts-mostly-part-1/

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Building a new ZX Spectrum from all new parts

This series of posts will be documenting my quest to building a ZX
Spectrum using as many still available parts as possible, I am not
sure yet if it's completely possible, but due to the work of people
like Charlie Ingley who created a brand new replacement ULA chip, I
am feeling confident.

I was going to redraw the board and get it printed, however my
initial research alerted me to these reproduction Issue 3B boards
available on PCBWay from PABB - the Issue 3B board was the most
common board for the 48k Spectrum, and is a good place to start.

[DSC_5469-1024x680]The board from PCBWay

I ordered the boards (well 5 of them due to minimum order quantities)
and started looking at what resistors, diodes, crystals, transistors
and capacitors from the original schematics, using a list from here,
I could still get from suppliers such as Farnell. I have reproduced
my findings here in a table I will keep updated.

  * Video Guide
  * Parts List and Build Diagram
  * Manufacturing the PCB
  * Installing Resistors
  * Installing Capacitors
  * Installing Diodes
  * Installing Transistors
  * Installing Power
  * Installing DIL Sockets

  * Lower and Upper RAM
  * The Sinclair ROM
  * The ULA Chip
  * Installing Video
  * The Horizons Tape
  * The Manuals
  * The Box and Putting Together
  * The Final Cost
  * Build Images

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