Have you tried filtering it out? maybe using ferrite beads on output of rtc module and input to other modules?Maybe scope it out to see what the noise is and maybe use some caps and maybe an inductor to filter it to ground?
David
ac9xh
On Wednesday, September 25, 2024 at 10:28:24 AM CDT, Joel Caulkins/N6ALT <caulktel@...> wrote:
Hi all,
?
Today I decided I've listened to this high pitch whine on the 20 meter through 10 meter band long enough. Through a process of elimination I determined that the RTC module is causing the offensive noise in the background. With it unplugged everything is nice and quiet. My questions are, do I even need a RTC if I don't do digital stuff, does anyone know of a fix for this to quiet it down? BTW, I tried the exact same module out of my V2 board and it sounds the same with it plugged in, so It's not a defective module. Is anyone having this high pitched whine? Maybe some bypassing of the module is in order?
