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Spectrum 128 Chips
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41464 / 4464 RAM Chip
4164 Spectrum "Upper RAM" Chip
74LS04 Logic Inverter IC
As used in Issue 6A Spectrum motherboards and also on some models of Spectrum 128
74LS157 IC (Texas Instruments)
78S05 5 Volt Regulator for Spectrum 128+2
Diagnostic Test ROM for the Spectrum 128 / +2
MuRata OKI Switch Mode 5v Regulator for Spectrum 128 "Toast Rack"
A replacement for the cheap inefficient 7805 used in the Spectrum 128 "Toastrack". This high-efficiency switch mode regulator wastes very little power as heat so no heatsink connection is required. It mounts directly onto the PCB where the 7805-connector wires are soldered.
TEA2000 Video Encoder IC