On 2019-06-20 20:18, Jay Hennigan wrote: > If you want to go really cheap and don't value your time, but do value > knowing the correct time, a GPS receiver with a USB interface and a > Raspberry Pi would do the trick. https://www.ntpsec.org/white-papers/stratum-1-microserver-howto/ RPi + GPS Hat because time across USB has much jitter. Patrick