Short video on replacing the rtc battery of a Taranis X9D Plus or any other OpenTX based radio. It's not a critical thing to replace, but if you want your time and date displayed correctly or logged ...

Abstract: Low-pass-filter (LPF) mismatch is a main source of frequency-selective (FS) I/Q imbalance in direct-conversion receivers. Using a first-order Taylor expansion approximation, the relationship ...

A focus on national security alone is limiting people’s access to key materials.

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