Components for the ZX81

Products:

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3 Amp Fuse for UK Mains Plug

3 Amp Fuse for UK Mains Plug

  • Appropriate fuse for the UK mains plug of Spectrum, Commodore 64 etc
  • Brand new, made to BS1362 standard - ASTA approved.
Price: £ 0.25   Add to cart. (41 in stock)
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. (23 in stock)
Replacement capacitors for Sinclair ZX81 - Issue 1

ZX81 Capacitor Pack #1

  • Replacement capacitors for the ZX81 issue 1 board (the version with radial caps and wavy PCB tracks.)
  • Comprises 2 caps: 1 x 1uf, 1 x 22uf (please check your board for any variations and let me know in the Special Instructions box during checkout if any substitutions or additions are required).
  • Good quality (Panasonic, Nichicon etc) long life caps.
Price: £ 0.99   Add to cart. (1 in stock)
Replacement capacitors for Sinclair ZX81 - issue 3

ZX81 Capacitor Pack #2

  • Replacement capacitors for the ZX81 issue 3 board (the version with axial caps)
  • Comprises 3 caps:  2 x 22uf, 1 x 1uf (please check your board for any variation and let me know in the Special Instructions box during checkout if any additions or subsitutions are required).
Price: £ 0.99   Add to cart. (1 in stock)
Spectrum RF TV Modulator UM1233 UK, PAL

Spectrum RF TV Modulator UM1233 (UK, PAL)

  • Original salvaged part, de-soldered from PCB
  • Tested: Decent RF output (little in the way of grain, waviness or flaring - but remember, RF is never Composite video standard)
  • Also used in the ZX81 and other computers
  • Note: Always re-cap the Spectrum motherboard before suspecting the modulator as being the source of a poor display.
  • To save postage costs (ie: to fit it in a large-letter size box) before dispatch I splay the two mounting lugs outwards - these will need to be straightened again with pliers before fitting.
Price: £ 3.95   Add to cart. (out of 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. (5 in stock)
ZTX313 Transistor

ZTX313 Transistor

  • Often found in the Spectrum at TR1, TR2, TR3 and TR6 locations.
  • Also used in the ZX81
Price: £ 0.99   Add to cart. (18 in stock)