Thread: Zx81
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Old 21st Mar 2020, 10:16 pm   #124
John Earland
Hexode
 
Join Date: May 2013
Location: Middlesbrough, North Yorkshire, UK.
Posts: 442
Default Re: Zx81

Quote:
Originally Posted by Slothie View Post
Inside the RAM pack there should be a 22uF electrolytic across the supply rails. If this has gone bad then it wont be supressing all the noise generated by the 12v inverter circuit used to supply the DRAM chips. This is likely the source of your interference.

Schematic & info:
https://www.myprius.co.za/ZX81.htm
Apologies if this is a daft question - but the piece refers to putting the diode in the video cable? It has an inner and an outer casing doesn't it? How would you go about that?
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