Most laptop supplies operate around 19 or 20 volts. Its a good place to start if you want to get 15V through a linear regulator.
I have used Nintendo Wii supplies for 12V applications that require less than 3.5A. Chinese clones of those can be bought on eBay for less than $10 with shipping. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -----Original Message----- From: Chris Albertson <albertson.ch...@gmail.com> Sender: time-nuts-boun...@febo.com Date: Thu, 5 Jan 2012 18:18:04 To: Discussion of precise time and frequency measurement<time-nuts@febo.com> Reply-To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] Power supply for 'Bay FE-5680A? On Thu, Jan 5, 2012 at 4:55 PM, Ian Bobbitt <time-n...@custodes.info> wrote: > Can anyone recommend how to power one of the latest crop of 2nd hand > FE-5680As? Are they the ones that need only 15-18vdc, or do they need the > 5v line as well? > > The latest batch of $40 units require +5V too. I measure about 80mA on the 5V suply. So you could make 5V with an LM7805 if you have 15 volts nearby. The 7805 would only burn 800mW. the 15V supply needs a solid 1.8A for about five minutes. and then drops to less than 1/2 of that. The spec says 300mV or ripple is alowed I'd using a lab type bench supply now but my plan is to use a laptop type supply that has a large coax type DC plug. I've seen some that as labeled as 15V, 6A for $11 (shipped) on eBay Older Tosiba laptops used 15V I don't really like switching supplies like this so I'm thinking of getting a 24V laptop supply and re-regulating it with a 7815 and a pass transisor so that the FE5680 sees a linier supply. In the end I bet I do both. Real soon now, like tomorrow I'm going to need a supply for a Thunderbolt too. I'll likely build two of those as well. Chris Albertson Redondo Beach, California _______________________________________________ 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. _______________________________________________ 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.