When I have been concerned with 'stealing' power, I have used a switching power supply wall wart. Small and are usually quite efficient. One model a Sony (branded), the chip inside even had a opto isolated control pin so it could be turned on/off via logic.
-pete > > > Yes, I have replaced the fans in four 5370A and 5370B counters with > modern 12V brushless DC motor units connected to the 10V supply. VERY > nice and quiet. I did before and after thermocouple tests in the chassis. > The temperatures were basically unchanged (+/- 3C). Variances could > easily have been due to the probes shifting. > > I have also done several dozen HP16500 logic analyzers and Tektronix > TM5003 and TM5006 mainfarmes. On the TM5003 and TM5006, I run the fan on > 8V. They are almost dead silent. > > > Use the lowest current fan that you can find... they tend to be the > quietest. > _________________________________________________________________ > Hotmail® has ever-growing storage! Don’t worry about storage limits. > http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage1_052009 > _______________________________________________ > 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.