Hi Yes indeed they do run a bit warm. You need a mounting location that gets them out of the way. Having them somewhere you can bump into them …. not good at all. The newer “toroid” designs are a bit quieter than the older versions.
Bob > On Jul 9, 2016, at 2:41 AM, Rob Sherwood. <[email protected]> wrote: > > The minor down side is these resonant transformers acoustically hum and run > hot. On the plus side they do clean up any kind of noise on the line. > Rob, NC0B > > Sent from my iPad > >> On Jul 8, 2016, at 1:52 PM, Brooke Clarke <[email protected]> wrote: >> >> >> >> Hi Bob: >> >> A resonate transformer may solve your problem. I added one to my first >> computer, See Fig 1. >> http://www.prc68.com/I/comp.shtml#SWTP >> http://www.prc68.com/I/Images/SWTP-01b.jpg >> The oval shaped silver can oil capacitor is connected to a winding on the >> transformer and resonates at 60 Hz. Think of it as a filter centered at 60 >> Hz and as an energy storage device. >> This removes line spikes and fills in narrow line drop outs. >> https://en.wikipedia.org/wiki/Voltage_regulator#Constant-voltage_transformer >> >> Here are models with capacities of: 300, 600, 1200 & 1800 VA: >> http://www.hammondmfg.com/CVR.htm >> Just search for "Constant-voltage transformer". >> >> -- >> Have Fun, >> >> Brooke Clarke >> http://www.PRC68.com >> http://www.end2partygovernment.com/2012Issues.html >> The lesser of evils is still evil. >> >> -------- Original Message -------- >>> I hope this isn't too far off topic, as this is having a big impact on my >>> testing. >>> >>> I decided to run an A/B test on one of my GPSDOs: comparing the phase of >>> the two 10MHz output channels. In the middle of the night, there was a >>> long series of 35ns pops in the phase data. Strangely enough, there was >>> nothing in the data collected directly from the unit involved. The >>> preceding two days we had had a number of switching transients where the >>> lights blinked but nothing shut down. So, putting one and one together, I >>> suspect that a fair percentage of the strange results I've been getting has >>> been power-grid related. >>> So, what to do? I've been looking at UPS devices, and I don't even >>> understand enough to waste my money on a bad one. The two big questions >>> seem to be "on-line" and "sine wave". Make that three: can I trust the >>> mfgs claims? Is there something affordable that could run a pair of 5370s >>> and maybe another 50W worth of DUTs for up to an hour or two and not be >>> prey to power-line transients? Or would it be more cost effective to >>> somehow monitor the power line for spikes or phase jumps and blow off tests >>> or cut out the offending data? From time to time we get a thread on >>> power-line nuts. Should I have been paying more attention? >>> >>> Bob - AE6RV >>> ----------------------------------------------------------------------------------- >>> GFS GPSDO list: >>> groups.yahoo.com/neo/groups/GFS-GPSDOs/info >>> _______________________________________________ >>> 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. >> >> >> >> -- >> If this email is spam, report it to >> https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg5OTEwNzgwNDpyb2JAbmMwYi5jb206ZGVsaXZlcmVk >> > _______________________________________________ > 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.
