Sinclair Spectrum 48k Composite Video mod with Decoupling Capacitor and Before/After video
Tuning in your spectrum is a pain in the bum, but with this easy to follow guide, you can easily create a composite output that can be used via a SCART input on your TV!
Before and after comparison is included in the video too!
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Mark Fixes Stuff
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i’ve found a lot of tutorials stating that the capacitor should be mounted with the positive lead connected to the rca cinch center pin,
and the negative lead connected to the solderpad on the board.
this sounds backwards to me, but i’m not sure what the consequenses would be of mounting that cap “backwards”.
any thoughts?
The current is very small and the “flow” will depend on the potential difference of the Spectrum and the TV. In theory the capacitor is simply decoupling the two devices in order to protect the display. The cap orientation in my video has been decided in co-operation with a few other hobbyists, some of whom have measured the flow on a few sets, so I’m confident that this is the best solution. In practice either way is probably fine and if not any consequences would simply be limited to a premature wearing of the added cap due to incorrect current direction.