Or a good battery as a source for the regulators as discussed in this thread already. It's quite nice to have all the different Voltages available at the same time, with up to 200mA. bye, Said In a message dated 1/31/2013 13:12:33 Pacific Standard Time, [email protected] writes:
Hi For $393.75 does it come with a wall wart? If not I would definitely go for a "medical" ground isolated / low leakage version to power the beast. The added cost over a plain jane wall wart won't add much to the purchase price percentage wise. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, January 31, 2013 3:58 PM To: [email protected]; [email protected] Subject: Re: [time-nuts] Low noise power supplies? Not sure if anyone posted this here yet, but Abracom has a very low noise (7nV/RtHz at 1KHz) power source for VCO's etc, with various outputs. It's sold on DIgikey or Mouser I think. Here is a review of that unit: _http://jaunty-electronics.com/blog/category/reviews/_ (http://jaunty-electronics.com/blog/category/reviews/) Co-incidentally he also has a review of one of our units on the same page. This is a very handy and reasonably priced power supply for many low-noise type of experiments. bye, Said In a message dated 1/30/2013 21:36:50 Pacific Standard Time, [email protected] writes: Lester Veenstra wrote: > The typical test supply on a bench for clean VCO testing is a small gel cell > battery. For a regulated power supply, make one using a 723. The 723 has > far lower noise out than the monolithic regulators. > > Depends on the variety of 723 some are noisier than others. Some use an internal zener reference, some use a bandgap reference. The original used a zener reference. Bruce > Lester B Veenstra MØYCM K1YCM W8YCM > [email protected] > > US Postal Address: > 5 Shrine Club Drive > HC84 Box 89C > Keyser WV 26726 > GPS: 39.33675 N 78.9823527 W > > Telephones: > Home: +1-304-289-6057 > US cell +1-304-790-9192 > UK cell +44-(0)7849-248-749 > Guam Cell: +1-671-929-8141 > Jamaica: +1-876-456-8898 > > This e-mail and any documents attached hereto contain confidential or > privileged information. The information is intended to be for use only by > the individual or entity to whom they are addressed. If you are not the > intended recipient or the person responsible for delivering the e-mail to > the intended recipient, be aware that any disclosure, copying, distribution > or use of the contents of this e-mail or any documents attached hereto is > prohibited. > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Richard (Rick) Karlquist > Sent: Wednesday, January 30, 2013 9:17 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] Low noise power supplies? > > > I know this topic has been discussed in the past on the list, but a > colleague is asking if there are any off the shelf low noise power supplies > for testing oscillators. Something a cut above an HP "brick" lab power > supply etc. They are hoping to avoid having to homebrew a power > conditioning circuit. > Did we ever arrive at a concensus as to the state of the art in homebrew > power conditioning circuits? > > Any help would be appreciated. > > Rick Karlquist N6RK > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
