Thanks Ed, that was another solution I was considering. I’ve got a few LMs in a drawer, I’ll have to order a few LTs. Steve WB0DBS > On May 3, 2020, at 11:02 AM, ed breya <eb@telight.com> wrote: > > If you have a supply with something north of 15V, and you'd like to make 12V battery type voltage, it's easy to add an external solution with a low dropout three-terminal regulator to take it down a bit and still get good regulation. Look at LT1085 family, for example. > > Ed > > _______________________________________________ > 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.

On Sunday, May 3, 2020, 12:26:30 PM EDT, Steve - Home <steve-krull@cox.net> wrote:  

Similar story.... I was using one of those small modules abundant on Amazon and eBay.  Buck converter and drop out board.  It was noisy so I put a ferrite bead on output side.  One worked ok.  Added another and that put the board into full oscillation and it outputted 37V into a DUT destroying it.  (It was set to 5v) --------------------------------------- (Mr.) Taka Kamiya KB4EMF / ex JF2DKG On Sunday, May 3, 2020, 12:26:30 PM EDT, Steve - Home <steve-krull@cox.net> wrote: Thanks Ed, that was another solution I was considering. I’ve got a few LMs in a drawer, I’ll have to order a few LTs. Steve WB0DBS > On May 3, 2020, at 11:02 AM, ed breya <eb@telight.com> wrote: > > If you have a supply with something north of 15V, and you'd like to make 12V battery type voltage, it's easy to add an external solution with a low dropout three-terminal regulator to take it down a bit and still get good regulation. Look at LT1085 family, for example. > > Ed > > _______________________________________________ > 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.