[GreenKeys] Recoar keyboard carbon contacts model 15/19

[Harold Hallikainen]

On Wed, September 10, 2025 9:04 pm, Windows XD wrote:
> Dear all,
>
>
> On my model 19 (the part I'm referring to should be the same on a 15),
> the carbon contacts which prevent arcing on the keyboard encoder have gone
> bad. What do you recommend to recoat them so the contacts stop shorting?
>

I'm not aware of any carbon contacts. On my model 15, I added an RC
network consisting of 100 ohms in series with 470 nF to get rid of
problems caused by arcing. See
https://w6iwi.org/rtty/tu170/#:~:text=The%20issue%20appears%20to%20be%20keyboard%20arcing%20getting%20into%20everything.%20A%20snubber%20consisting%20of%20100%20ohms%20in%20series%20with%20470%20nF%20was%20put%20across%20the%20keyboard%20contacts.

Harold
https://w6iwi.org


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