Thread: Zx81
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Old 23rd Mar 2020, 10:41 am   #142
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 8,625
Default Re: Zx81

Maybe, but replacing that would be expensive so I suggest you rule the composite mod in or out by reverting the machine to the way it was (ie, with modulator in circuit). Let the machine run for a long time with the best picture you can get tuned in on a TV and see if the machine stays stable.

if it does, remove the simple mod and fit your new CCB PCB, and see how the machine behaves then.
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