Jeff from your description it is not clear wether the noise is due to the UPS or 5061B. The 5061 transformer most likely will complain with a crappy signal input.I do not trust the output from UPS since many have a crappy output which is ok if your PC does not have PFC on the input. I have in the past always used and recommended to run the units from 28 Volt direct, not even using the AC input. Batteries do not have to be deep cycle since power failures are not that prevalent and batteries will die from chemical deterioration rather than cycle use. Low voltage cut out is mandetory since car batteries will fail after a few full discharges.For instance Costco car batteries have long warranties and combined with a Guest dual 12 V 5/5 charger makes a perfect set up for less than $230 and run time will be about 24 hours. If you do not mind making small changes to the A2 charger board you can get the same result for half the price supplying power from the 5061B. I prefer the Guest approach and I have noticed a price escalation on Guest chargers but you can still get one for $110 shipping included. Bert Kehren In a message dated 9/3/2011 6:32:19 A.M. Eastern Daylight Time, [email protected] writes:
Hi. We lost power for several days after the hurricane last weekend. As a precaution I pulled the AC plug for my 5061B from the UPS it's attached to since I was pretty sure that we would be without power for a while and didn't want to have the unit plugged in when the power came back in case there was a surge. Power was restored on Tuesday but I only got around to powering up the system this morning. When I plugged it in, it immediately started making a buzzing sound - alomost like an alarm. The system appears to be working normally otherwise - alarm LED on, clock advancing, etc. I've never heard this buzzing before during power up. Not knowing what the issue was, I powered the system down. Anyone have any clue before I start tearing it down? BTW - I don't see any mention of this in the manual. Thanks in advance. Jeff _______________________________________________ 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.
