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Modifications for Spectrum 128 variants
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1.65K Resistor - Toastrack AY-Beeper Balance Mod
A 15uH inductor & 82pf Capacitor for Spectrum 128 and +2 Video mod
Spectrum 128 / +2s often have a yellow/cyan shadow in their RF and Composite video output. It is possible to reduce this effect by connecting a 15uH inductor and a 82pf capacitor in series and soldering them between pins 8 and 17 of the Spectrum 128 +2's TEA2000 video encoder chip.
470 Ohm resistor
Anti-Jailbar capacitors for Toastrack Spectrum 128
It has been found that replacing C7 and C8 with 1uf ceramic capacitors and the 22uf electrolytic cap at C28 with a 47uf version often reduces the jailbar effect on the "toastrack" Spectrum 128. This kit contains all three caps. More info can be found here.
GAL16V8-15 programmed with Unrainer for Spectrum 128s
48-pin size heatsink - Self Adhesive
3 Metres of flux-cored 60/40 tin-lead solder
Good quality, 0.7mm diameter - ideal for fine electronics work.
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.