[TechAssist] Re: use a battery backup UPS for TV,DVD,surroundamp system protection ?
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 07 May 2004 14:36:52 -0400
Isn't that what older audio power amps did? drive at class B, then an=20
output transformer that smothed out the signal?
I think that would work, except that the UPS is in standby til power=20
loss, but the transformer would be in service all the time. A tech=20
friend bought a 1:1 120VAC heavy duty transformer that he runs his=20
whole bench from isolated. 100% duty cycle, 9 hrs a day. Good point, Pete=
r.
Phil
Peter oliver wrote:
>What about adding a 1:1 isolation transformer to turn the square wave in=
to a=20
>sine wave?
>
>Peter Oliver
>Tucson Radio TV
>
>
>From: "J Silverman" <greentron@xxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: <techassist@xxxxxxxxxxxxx>
>Subject: [TechAssist] Re: use a battery backup UPS for TV,DVD,surround a=
mp=20
>system protection ?
>Date: Fri, 7 May 2004 13:12:42 -0400
>
>The computer power supplies work fine with the 115 VAC (RMS) square wave=
>output from the low cost UPSs. Most consumer electronic equipment is rat=
ed
>for 115 volt RMS 60 Hertz sine wave, plus or minus 10%. If you use the
>computer UPS with consumer electronic equipment the internal voltages an=
d
>losses are different than the spec., so you are not sure if you will hav=
e
>functional problems or if things will overheat. A lot of stuff will prob=
ably
>work OK, but you cant be sure. So the suggestion was made to use UPSs th=
at
>have a sine wave output and these are many times more expensive than the=
>ones with a square wave output.
>
>Jerry Silverman
>Greentron Inc
>4 Newland Ave
>Greenville SC 29609
>864 232 3889
>Fax 271 2080
>mailto:greentron@xxxxxxx
>----- Original Message -----
>From: "Kevin" <kevintv@xxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Friday, May 07, 2004 5:30 AM
>Subject: [TechAssist] Re: use a battery backup UPS for TV,DVD,surround a=
mp
>system protection ?
>
>
> > Using a UPS for a computer is also designed to save what a person is
> > working on at the time of a power outage. When the power goes out th=
e
> > computer stays on and the person can save his work and then shut the
> > computer down properly. In some cases it will also prevent data from=
> > being corrupted on the hard drive when the power goes out. Having th=
e
> > power outage causes windows to shut down improperly, which could corr=
upt
> > data on the hard drive.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Hoyt's TV
> > Sent: Friday, April 30, 2004 2:11 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: use a battery backup UPS for TV,DVD,surroun=
d
> > amp system protection ?
> >
> > Considering the price of some TVs and stereos these days, I'm surpris=
ed
> > they
> > don't push UPS's for those, like they do for computers. Computers wer=
e
> > the
> > first things that were overly sensitive but TVs etc. have now caught =
up.
> >
> >
> > Russ Hoyt
> > Hoyt's TV
> > Exeter, NH
> >
> >
> > ----- Original Message -----
> > From: "Larry Poffen" <lpoffen@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, April 30, 2004 3:46 PM
> > Subject: [TechAssist] Re: use a battery backup UPS for TV,DVD,surroun=
d
> > amp
> > system protection ?
> >
> >
> > > I have used a APC 1000 for my personal stuff for about 2 years. I =
had
> > a
> > > power surge that took it out this year, along with many other thing=
s,
> > but
> > my
> > > 36" TV &VCR/ stereo stuff were all OK. It is worth the peace of
> > mind.
> > > Larry
> > >
> > > Larrys TV Service
> > > Broken Arrow OK 74011
> > > phone 918-455-1041
> > > Fax 918-451-4485
> > > e-mail lpoffen@xxxxxxx
> > > ----- Original Message -----
> > > From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, April 30, 2004 9:06 AM
> > > Subject: [TechAssist] use a battery backup UPS for TV,DVD,surround =
amp
> > > system protection ?
> > >
> > >
> > > > I never heard of anyone doing this, but I've had this thought for=
a
> > few
> > > > years:
> > > > use a heavy battery back up UPS like used on PC systems for an
> > > > entertainment center. Many ills are from power
> > > > fluctuations,sags,surges,etc. TV EEPROMs corrupted, power supplie=
s
> > > > damaged, pro-jo CRTs damaged with a spot because it went down at=
> > once
> > > > without proper power down,etc.
> > > > Most equipement is not a heavy current draw.
> > > > Can this be done and should it?
> > > > I have a Zenith 50" projection TV (not wide screen,standard 3:4)
> > which
> > > > is rated at 215 watts (2.8A) "max".
> > > > I think my VCR/DVD deck pulls maybe 30 watts.
> > > > My Bose "lifestyle 7" surround amp, I don't know the wattage.
> > > > And a cable box maybe another 30 watts?
> > > > I'm guessing 300-400 watts max running everything
> > > > if using the sound system as well. Much less if using only the
> > projo's
> > > > speakers.
> > > > Now most of these UPS units are in standby mode and the connecte=
d
> > gear
> > > > is running off line current until there is a power loss, which ti=
me
> > > > ultra-fast switching transferrs power to the battery system. This=
> > would
> > > > be only needed for intermittant power fluctuations, or if lost
> > totally,
> > > > enough time to safely power off the audio/video system.
> > > > A 6 outlet power strip plugged into the UPS would be convenient.
> > > > What would be a good power rating for a UPS?
> > > > Twice needed wattage? whats rule of thumb, and also whats your
> > feedback
> > > > on this idea?
> > > > Phil Bader
> > > >
> > > > --
> > > >
> > > > Philip Bader
> > > > Jan Phyl TV Inc. (estab. 1976)
> > > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > > Fax (863) 299-8821
> > > > email: tjanphyl@xxxxxxxxxxxxxxx
> > > >
> > > >
> > > >
> > >
> > >
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--=20
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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