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. (8 in stock)
4164 Spectrum Upper RAM chip

4164 "Upper RAM" Chip - Texas Instruments Brand

  • Organization: 64K x 1, Speed: 150ns or faster. Package: 16 pin DIL
  • Unused, old stock parts. Good clean condition and tested for 2 hours before dispatch.
  • VERY IMPORTANT:
  • Regarding Spectrum boards with Texas Instruments brand upper RAM (ie: TMS4532-15NL3, TMS4532-15NL4) - these 4164s can be mixed arbritrarily with the existing upper RAM chips. IE: You can fit one to eight 4164s, just replacing the faulty chips.
  • However, with Spectrum boards with OKI brand upper RAM chips (ie: OKI M3732H-20, OKI M3732L-20) all eight upper RAM chips must be replaced with 4164s and the RAM jumpers should be set to Texas Instruments type RAM.

Please note: 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 48 PCB.

Price: £ 1.40   Add to cart. (21 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. (17 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. (14 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)
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. (4 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. (7 in stock)