Sinclair ZX81 computer – Refurbished and Upgraded to 32K RAM and HRG Ready

Description

Thanks for looking at our Sinclair ZX81 computer – Refurbished and Upgraded to 32K RAM and HRG (Hi Res Graphics) Ready!

Condition is Seller refurbished.

We’ve performed the following work on this little beast:

• New Membrane
• 2C184E ULA with Heatsink
• Electrolytic capacitors changed for new quality aluminium types
• New DC converter to replace ageing 7805 Regulator
• Added custom PCB to add composite video and back porch for new TV’s
• Added custom 32K SRAM upgrade with HRG8 support (Hires Graphics)
• Cases cleaned
• New Feet added
• PSU with new Capacitors

All in all, this is a well upgraded, refurbished ZX-81 with a case which is very tidy.

The actual screen is crystal clear with no lines or patterns on the display.

Also available on eBay – http://ebay.us/IXhdW9?cmpnId=5338273189