[time-nuts] 5070B once more.... (actually 5370A fans)
pete at petelancashire.com
Wed May 20 16:47:41 UTC 2009
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
> 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
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