I used a variable voltage bench supply to experiment. tried low voltage like you are seeing on my FE5680 and I never got a lock. The FE5680A spec sheet says 15 to 18 volts and I think you can get buy with 14.5V. i tried 12.5 and got "nothing"
I did not test to find the "breaking point" But 1/2 volt low was OK and 2.5V low was not ok. What I bought is a 15V open frame supply from allelectronics.com for $11.50. It turned out to be a very high quality power supply (Digikey has the same unit for almost $40) This PS does not drop volts even with the line input and load well out of spec (I tested 63VAC input to a 4A load briefly) I added an RF "hash" filter "just because I could" and then an LM7805 and I think I'm OK. I thought about making a linear supply for the cleanest power but i intend to run this 24x7 and don't like wasting so much power. This is the one I bought http://www.allelectronics.com/make-a-store/item/PS-152/15VDC-2.7A-POWER-SUPPLY/1.html On Wed, Jan 18, 2012 at 3:05 PM, Paul F. Sehorne <p...@sehorne.org> wrote: > How important is the 15vdc at the initial startup 2amp, and then how > important at the .7 amp settled rate? > > I just received two of these > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280439877318 > > Unloaded voltage is ~15.5vdc. At 700 ma voltage drops to 14.3 volts and > with 2 amp load drops to 13.3 volts with a 2 amp load (and to 10 volts with > a 5 amp load). Supposedly rated at 6 amps. I have only checked one, have > not broken the packaging on the second one assuming its performance will be > similar. > > Will this be a problem? > > Paul > > _______________________________________________ > 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. -- 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.