Spectrum 128 Chips

 

Products:

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41464 RAM Chip

41464 RAM Chip

  • Organization: 64K x 4
  • Speed 120ns
  • NEC brand
  • Package: 18 pin DIL
  • New, old stock (not desoldered) - all tested before dispatch.

As used on late revision motherboards of Commodore 64, Spectrum 128 +2A/+2B/+3 

Will also replace 4464 type RAM ICs.

Price: £ 2.35   Add to cart. (2 in stock)
4164 Spectrum Upper RAM chip

4164 Spectrum "Upper RAM" Chip - Samsung / Panasonic Brand

  • Organization: 64K x 1, Speed: 150ns or faster, 128-cycle refresh, Package: 16 pin DIL
  • Unused, old stock parts. Good clean condition and tested for 2 hours before dispatch.
  • Can be used individually or in any quantity to replace any of the original Upper RAM chips used in the Spectrum 48K (eg: Texas Instrumenents TMS4532-15NL3, TMS4532-15NL4,  OKI M3732H-20, M3732L-20). The RAM type jumper settings on the PCB can be ignored when using these chips (please see this page for more info regarding the Spectrum's Upper RAM.)
  • These chips cannot be (directly) used to replace the "4116" chips used for the LOWER 16KB of RAM in the bottom left of the Spectrum's PCB.
Price: £ 1.40   Add to cart. (4 in stock)
74LS04 Logic IC

74LS04 Logic Inverter IC

As used in Issue 6A Spectrum motherboards and also on some models of Spectrum 128

Price: £ 0.75   Add to cart. (22 in stock)
74LS157 Logic IC

74LS157 IC (Texas Instruments)

  • Logic IC used in the ZX Spectrum (multiplexor chip) and in some models of Spectrum 128
Price: £ 0.80   Add to cart. (16 in stock)
78S05 5 Volt regulator for Spectrum 128 +2

78S05 5 Volt Regulator for Spectrum 128+2

  • This is the higher power (2 Amp) version of the 7805 regulator as required by the 128+2
Price: £ 0.79   Add to cart. (4 in stock)
Diagnostic ROM for 128

Diagnostic Test ROM for the Spectrum 128 / +2

  • Because the ROM in the 128 / +2 is almost always in a socket, a cheap / easy was to run diagnostics is to simply replace it with an EPROM burned with a diagnostic test program. No PCB mods are required - you can simply swap back to the original ROM when everything is working.
  • Please note the orientation of the ROM when fitting (the chips in the +2 are "upside down")
  • By default, I supply the ROM programmed with my own diagnostic program but if you'd prefer Brendan Alford's ZX-Diagnostics ROM (or any other ROM images) just let me know in the Special Instructions box during checkout.
Price: £ 2.50   Add to cart. (5 in stock)
Switch Mode 5v Regulator - Unmodded, vertical mount (replaces 7805)

MuRata 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.

  • High efficiency 5v 1.5A output
  • Short circuit protection
  • Over current shutdown
  • Over temperature shutdown
  • Unmodified for direct-PCB vertical mounting in Toastrack Spectrum (instructions included).
  • Can also be used in the standard Spectrum48, but as this version of the MuRata regulator is unmodified it cannot be used on Spectrum48 Issue2 boards (in a rubber-key case) as the regulator must be horizontally mounted due to space constraints. (See the Spectrum Mods section for a version modded for horizontal mounting.)
Price: £ 4.50   Add to cart. (7 in stock)
TEA2000 Video Encoder IC for Spectrum 128 +2

TEA2000 Video Encoder IC

  • As used in the Spectrum 128 +2 etc
  • Symptoms when the IC is faulty include no video, monochrome only video.
Price: £ 3.99   Add to cart. (5 in stock)
Traco 2 Amp 5 Volt switching regulator

Traco 2 Amp 5 Volt switching regulator

  • Cool running power regulator capable of delivering 5 volts @ 2 Amps
  • Replaces the L78S05 regulator header in the Spectrum 128+2 (solder direct to PCB)
  • Large heatsink no longer needed.
  • Pin out / fitting diagram included.
Price: £ 12.50   Add to cart. (5 in stock)