I hear what you're saying.... I'll just keep it at 110v. We don't have problems with brownouts here - quite the opposite infact. I've seen close to 250v coming out of a nominally rated 240v supply.... cheers Greg --- In xl7@yahoogroups.com, "Bob S." <tttsystems@e...> wrote: > Never mind, I see you are responding to the 80 volts idea. These voltage converters are usually spec'd at +/-10% so 90 volts is the minimum I would go. After that, things may fall out of regulation, especial with a little voltage drop (brown out) as is common in power systems.... > > Bob > Corona/Riverside, CA > > ----- Original Message ----- > From: José Sáez > To: xl7@yahoogroups.com > Sent: Sunday, January 09, 2005 5:11 PM > Subject: Re: [xl7] Re: 220 vs. 110 volts > > > I'm not sure if i would try that test again... > > A low voltage has less probability to fry your MP7 circuits since the resistance diminishes as voltage goes down. However these are digital devices. A low voltage could change the difference between 0 (no current) and 1 (current). Running digital devices at low voltages has some funny results if you try it with a Casio SK-5; it adds distortion to the sound since some bits pass and some don't. > > But i wouldn't risk to do that with a machine whose O.S. is written in flash memory... What if you corrupt the data ? You could end with a machine with a flat EEG... > > Jose > > I'm NOT going to fix your computer. > ........ > ----- Original Message ----- > From: groakes2000 > To: xl7@yahoogroups.com > Sent: Sunday, January 09, 2005 7:04 PM > Subject: [xl7] Re: 220 vs. 110 volts > > > > Thanks Guys - > > I borrowed a stepdown of my father-in-law. It has a dial on it > whereby you can adjust the voltage down as low as 80v. Just for a > test, I tried running the MP7 at 80v to see what would happen. It > took a few seconds to power on, but other than that it appeared that > everything ran normally..... > > cheers > Greg > > > --- In xl7@yahoogroups.com, "Bob S." <tttsystems@e...> wrote: > > Great test and work Jose...thanks for the affirmation..... > > > > Bob > > Corona/Riverside, CA > > ----- Original Message ----- > > From: José Sáez > > To: xl7@yahoogroups.com > > Sent: Sunday, January 09, 2005 8:45 AM > > Subject: Re: [xl7] Re: 220 vs. 110 volts > > > > > > All right, i measured temperatures of the surface of the unit > day and night after 1 hour of operation at 220 and 110V (i waited > for the unit to cool down before taking the next measure), and this > are the results: > > > > 220V ---> average Tº: 36º C (96.8 F) > > > > 110V ---> average Tº: 29.6º C (85.28 F) > > > > The average environment Tº has been around 80-90 Fº these days. > > > > In conclusion: even when the manual says that the XL-7 unit can > be run at 220V, it is advisable to use a stepdown voltage converter > in order to reduce heat and add to stability and extend it's working > life. > > > > I haven't measured the Tº inside the case, but i suppose it > could be even higher. Don't want to run the risk... > > > > Jose > > > > ----- Original Message ----- > > From: gonzinigonz > > To: xl7@yahoogroups.com > > Sent: Saturday, January 08, 2005 11:08 AM > > Subject: [xl7] Re: 220 vs. 110 volts > > > > > > > > Sounds like another switchmode PSU failing.. > > This would explain your errors that you've been having. It > doesnt > > happen without power. > > Its one of the most common faults with any electronic / > electrical > > gadget, lack of correct supply voltages ie failed PSU's > > I have an BSS FDS366 Omnidrive here to repair. Guess what > failed > > swithmode! Sometimes it will start up and be fine. Other times > you > > have to repeatedly turn it on/off to get it to fire up. > > This fault is with the start up circuitry.. > > Anyway id start looking for a replacement PSU for it, there > has been > > talk of this on the list.. > > Im sure another type of switchmode could be fitted, > voltage's / > > size / shape permitting. I dont think these command stations > are to > > strange in the PSU department > > I run my XL-7 via a 110v transformer now, the PSU gets far to > hot for > > my liking on 240v ;o) > > Regards > > Gonz > > > > > > > > > > #--- In xl7@yahoogroups.com, "groakes2000" <groakes@i...> > wrote: > > > > > > On another note, my continuing problem with Fatal Errors has > been > > > somewhat ameliorated by using a stepdown transformer running > at > > > 110v. Time between failures now stretches out to over 5 > hours.... > > > Which reinforces the thought that maybe my problem is > related to a > > > heat related failure of a component whose tolerances are > > > rather "fine".... > > > > > > cheers > > > Greg > > > > > > > > > > > > ----------------------------------------------------------- ------ > ------------- > > Yahoo! Groups Links > > > > a.. To visit your group on the web, go to: > > http://groups.yahoo.com/group/xl7/ > > > > b.. 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Message
Re: 220 vs. 110 volts
2005-01-10 by groakes2000