Components for the ZX81

Products:

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7805 5 Volt Regulator IC

7805 Voltage Regulator

Replacement 5 volt regulator IC for the Spectrum, (breadbin) Commodore 64, ZX81 etc

Price: £ 0.50   Add to cart. (11 in stock)
Replacement axial electrolytic capacitors for Sinclair ZX81 (issue 3)

ZX81 Capacitor Pack #2

  • Replacement capacitors for the ZX81 issue 3 board -IE: the version with axial caps (2 or 3 may be present on the board - this pack contains 3 to cover both cases)
Price: £ 0.99   Add to cart. (8 in stock)
Replacement radial electrolytic capacitors for Sinclair ZX81 (issue 1)

ZX81 Capacitor Pack #1

  • Replacement capacitors for the ZX81 issue 1 board -IE: the version with radial caps and wavy PCB tracks.
  • Good quality (Panasonic, Nichicon etc) long life caps.
Price: £ 0.99   Add to cart. (10 in stock)
Z80 CPU - NEW

Z80 CPU - New

  • Brand new direct replacement Z80 Central Processing Unit for Spectrum (and ZX81 etc) 
  • Modern lower-power CMOS version, made by Zilog.
  • Replacing the CPU should resolve the known issues with the out-of-spec Z80s sometimes found in Spectrums. (EG:  External interfaces not working correctly due to timing anomalies and weak signals such as "M1")
Price: £ 4.75   Add to cart. (12 in stock)
Z80 CPU - Salvaged

Z80 CPU - Salvaged

  • Original NMOS type Z80 Central Processing Unit for Spectrum (and ZX81 etc)
  • Made by NEC, marked D780C-1 
  • De-soldered from a Spectrum board, cleaned and re-tested (inc. checking "M1" output and NMI response)
  • Straight, long pins (not cropped short) so easy to re-use.
Price: £ 2.50   Add to cart. (out of stock)
ZTX313 Transistor

ZTX313 Transistor

  • Often found in the Spectrum at TR1, TR2, TR3 and TR6 locations.
  • Also used in the ZX81
Price: £ 0.95   Add to cart. (18 in stock)