Hi Indeed, for anything designed as a mobile device, you want the 15V supply rather than the 12V. Set it to the low end of the range and you are fine. A lot of mobile gear is only happy with > 13V on the input. If it pulls noticeable current, cable drop will get you on a 12V supply.
For a GPSDO or an OCXO, you do indeed want 12.0 V into the device. For the OCXO, you might also want “point of use” regulation. Now you are right back to a 12 + 2 = 14V supply. Bob > On May 3, 2020, at 12:52 PM, Dave B via time-nuts <[email protected]> > wrote: > > Has anyone found schematics for the Mean Well supplies? I have a couple of > 15V 7A ones that will adjust down to 14.1 and I?d like to get them down to > the 12-13.8 range. > > Steve > WB0DBS > > > If they have remote sensing, you can do stuff with that too. Else, trace out > the cct around the voltage setting pot, there will probably be some fixed > resistor at each end, one or other will move the high or low point as you > need. (Lower values = greater adjustment range.) > > BUT! Note, that though you can usually lower the output voltage, you will > not get any extra current as that is limited by the transformer design and > capabilities. > > Similarly, if you raise the output voltage, you will need to de-rate it's > current output ability, so as not to exceed it's power capability. Don't go > too far from nominal (especially lower voltage) as the control loop > regulation may misbehave under some load conditions. > > In any case, 14.1 is OK for most "12V" kit, especially anything that is > intended for use in a vehicle, where the engine running battery voltage can > often be up near 15V with modern vehicles and battery chemistry. > > 73. > > Dave G0WBX. > > > On 03/05/2020 17:00, [email protected] wrote: >> Has anyone found schematics for the Mean Well supplies? I have a couple of >> 15V 7A ones that will adjust down to 14.1 and I?d like to get them down to >> the 12-13.8 range. >> >> Steve >> WB0DBS > > -- > Created on and sent from a Unix like PC running and using free and open > source software: > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
