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Re: High pitch whine on 20-10 meters #sBitx

 

Hi David,
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Yes I have tried filtering the high pitch whine out with caps on the 5 volt supply, they have had no effect at all. I believe the noise is from the I2C buss, because with the RTC unplugged in I can still hear the same noise only very lightly, (still a vast improvement). As far as I know there is no way to filter the I2C buss without affecting it's performance. If anyone has any ideas on how this can be cleaned up, I would love to hear it, meanwhile I will run without the RTC.
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Joel
N6ALT
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