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Trimmer for crystal frequency fine tuning #14

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eluancm opened this issue Dec 26, 2022 · 0 comments
Open

Trimmer for crystal frequency fine tuning #14

eluancm opened this issue Dec 26, 2022 · 0 comments

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@eluancm
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eluancm commented Dec 26, 2022

A trimmer capacitor with a reasonable range instead of a fixed capacitor on the TMS9918A pin 40 would be useful to fine-tune the frequency and get good colors.

On one of my aged TVs, I need to put a finger on this pin to get any colors, regardless of fine tuning.
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