Emu XL-7 & MP-7 User's Group

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@...m 
  >   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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