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
>
>
>
>
>
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Re: [xl7] Re: 220 vs. 110 volts
2005-01-10 by Bob S.