Hi If you use the typical eBay units, they have a *lot* of noise. There are devices like the Linear Tech “switchers on a chip” ( = Silent Switcher) modules that can be quieted down pretty well. You needed a good board layout to do it though. They claim to have reduced that problem with the latest versions.
Bob From: jimlux Sent: Saturday, March 9, 2019 9:00 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Power supply for OCXO using "USB power blocks" Has anyone tried a +5V to +15V DC/DC to run an OCXO, getting the 5V from one of those rechargeable USB power bricks. I was thinking about portable operation. In my case, the OCXO is something like a Wenzel streamline. I would think that the DC/DC probably has some noise, but maybe DC/DC to a higher voltage, then a good linear regulator to clean it up (or would the radiated noise just leak around). How quiet is the output from those USB battery things..I've used one to run a RTL-SDR, but that's hardly a ultimate low noise receiver. jim _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
