On Wed, 14 Oct 2015 06:34:39 +0000, you wrote: >They're quite neat, but I wish there were something a little less >heavy-duty for the 1-2 Amp range. For the small stuff, I use the little round plugs that come in a bunch of sizes; I've tried to standardize my shack on 5.5X2.5mm for things like a VLF upconverter and a little broadband amplifier mounted in a diecast box (Who doesn't love Digi-Key?). But I still put powerpoles with the smaller contacts on the other end to run on the shack's 12V bus. -- Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/4 in upstate New York, 1420' elevation. NY WO G

http://phk.freebsd.dk/hacks/HP5065A/20150930_dcdc/index.html

Hi > On Oct 14, 2015, at 2:34 AM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > > -------- > In message <20151013225202.1e70abe8@aluminium.mobile.teply.info>, Florian Teply > writes: > >> DC-DC converters with very >> good efficiency exist for quite some time now. > > The one I just put in my HP5065A does 60W with 90+% efficiency > in a 2x1x.5 inch package: > > http://phk.freebsd.dk/hacks/HP5065A/20150930_dcdc/index.html > >> Umm, around here, at least for ham radio operators, it seems many >> standardize now on PowerPole connectors for 12V DC. > > They're quite neat, but I wish there were something a little less > heavy-duty for the 1-2 Amp range. So far my answer to that has been the coaxial power plug that you see on a lot of wall chargers. Pick a size and have them ship you a bucket full of pre-made cables for next to nothing. The cables with both male and female ends are cheaper than the ones with tinned leads on one end (go figure …). That makes the “which one do I buy” decision pretty easy. Once they come in and you chop them up, a bit of quality time with the soldering iron gives you a reasonable inventory of power squids to distribute your +6, +12 or +24V. Bob > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

     http://phk.freebsd.dk/hacks/HP5065A/20150930_dcdc/index.html

Those traco power units are fantastic. Absolutely great. For smaller applications Murata makes 3W ones quite similar and Wurth Electronik is also in that market. On Wed, Oct 14, 2015 at 12:00 PM Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > -------- > In message <20151013225202.1e70abe8@aluminium.mobile.teply.info>, Florian > Teply > writes: > > >DC-DC converters with very > >good efficiency exist for quite some time now. > > The one I just put in my HP5065A does 60W with 90+% efficiency > in a 2x1x.5 inch package: > > http://phk.freebsd.dk/hacks/HP5065A/20150930_dcdc/index.html > > >Umm, around here, at least for ham radio operators, it seems many > >standardize now on PowerPole connectors for 12V DC. > > They're quite neat, but I wish there were something a little less > heavy-duty for the 1-2 Amp range. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >