Is the bridge excitation AC or DC. If it's AC, you may not even need low-noise power supplies.
-John ============== > Hi Will, > > You could consider building your own power supply system for the > replacement of > the batteries. Use a separate power transformer which, I suspect, would > be small > as the current requirements would be low for driving a bridge circuit. > > The main company to look toward for high quality, low noise regulators is > Linear > Technology. Here is a candidate part to look at : > http://www.linear.com/product/LT3082 > > This is the lowest noise (33uv/10Hz to 100KHz) low dropout regulator that > can > handle regulating 24 volts and is adjustable, meaning use can use this > part for > all three voltages (i.e., three regulators). You will have to decide if > it noise > specs are suitable for your needs. Keep in mind that battery noise is > typically > random whereas the noise out of a regulated system tends to be constant. > > If you really think you need lower noise then you could consider an LT1000 > shunt > reference. Typically the circuit designs for LT1000 type devices are as > references and lack current capability above about 10 milliamps. Adding > additional current circuitry would add more noise. See: > > http://www.linear.com/product/LTZ1000 > > > Bill....WB6BNQ > > > Will Matney wrote: > >> Hello, >> >> I am in need of a very clean 24 Vdc power source, to replace some old >> mercury cell batteries with. What would a good low noise, clean, power >> supply be in your recommendations? I thought of using two 12 Vdc >> lead-acid >> batteries in series, and making a charging circuit with regulators, but >> I >> am hoping to purchase a good used supply off ebay, etc. The old circuit >> used two 12 Vdc snap terminal mercury batteries in series, for 24 Vdc, >> along with a 7 Vdc mercury cell, and two plain AA carbon 1.5 Vdc >> batteries >> in series for 3 volts. Any help and or ideas would be appreciated. >> >> Thanks >> >> Will >> >> _______________________________________________ >> 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.
