ZX Spectrum 4116 RAM Replacement Board - Part 1
4116 Dynamic ram STC 16K x 1 DRAM SINCLAIR ZX SPECTRUM 8PCS + Socket base (NEW) | eBay
Chips
ZX Spectrum 16K to 48K memory upgrade kit | ByteDelight.com
ZX Spectrum Recreation Goes Next Level with New Manuals and Pack-In Goodies - Hackster.io
Chips
Refurbishing a 48K Rubber Keyed Sinclair ZX Spectrum – Pt.3 Upper RAM Replacement | ProjectAVR
Sinclair ZX Spectrum - issue one logic board and optional 32k ram expansion Stock Photo - Alamy
Sinclair ZX Spectrum +2 RAM Repair / Composite Video Fix - YouTube
LGR Oddware - Sinclair RAM Turbo Interface - YouTube
Chips
external 128kB upgrade
Shared Memory Dump
RAM Turbo Add-on for the Sinclair ZX Spectrum Computer
ZX Spectrum Upper RAM Module - zx.zigg.net
ZX Spectrum +2 Repair and RAM test, how to. - YouTube
Sinclair ZX Spectrum turns 40 – Born's Tech and Windows World
Repairing ZX Spectrum+ 48K – Ask Notes
