[TechAssist] Re: Re Mr Ohms turning in his grave 220Volts?????? SHOCKED!!!!!
- From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 19 Dec 2002 19:44:06 -0500
The switchmode load is constant power, so the pulse width modulator will
narrow up the pulses if the supply voltage increases, reducing the average
input current. Same thing is true of none-electronic constant power load
devices, like refrigerator compressor motors. Decrease the input voltage and
the input current increases. This increases the I-squared-R loss in the
motor and it runs hotter. So if the power company decides to give you
reduced voltage you start overheating compressor motors.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: <gulftech@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 19, 2002 12:48 PM
Subject: [TechAssist] Re: Re Mr Ohms turning in his grave 220Volts??????
SHOCKED!!!!!
>
> Dear Villy,
>
> Most of us know that formula as P = IE. Since current is directly
> proportional to voltage ( I = E/R), an increase in voltage yields a
> corresponding increase in current with R held constant. If current and
> voltage are both doubled, power is increased by a factor of 4.
>
> If I'm wrong, please set me straight.
>
> Regards,
>
>
> Ken Smith
> Gulf Technical Services
> 3034 Gulf Breeze Parkway
> Gulf Breeze, FL 32563
> 850-934-8324 (Voice) 850-932-0819 (Fax)
>
>
> On Thu, 19 Dec 2002 11:03:37 0000 "Vilhelm Boor" <villyboor@xxxxxxxxx>
> writes:
> >
> > Villy boor
> > Boorelec Durban
> > When I read some of this I am rather surprised, where were some of
> > you trained, what happened to Ohms law? Why 2 round prongs. Most
> > countries use various combinations of flat pin at various angles,
> > Round pins tended to have a bakelite body.
> > But please remember W=IV so the greater V is the less I will be so
> > cables are lighter, plugs can be smaller and fuses lower I. Philips
> > for example make a wide range of TV with an input requirement of
> > from 90V to 270V, just plug it in and its working. I am sometimes
> > left speechless, this is your subject and livlihood, you must know
> > basics.
> > On Wed, 18 Dec 2002 19:43:29
> > teltek2 wrote:
> > >
> > >No...Their 220 does not requite a huge plug like your dryer..just 2
> > round
> > >prongs.
> > >
> > >-Ed-
> > >Tel-Tek Electronics
> > >Ontario-Canada
> > >
> > >teltek2@xxxxxxxxxxxx
> > >----- Original Message -----
> > >From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
> > >To: <techassist@xxxxxxxxxxxxx>
> > >Sent: Wednesday, December 18, 2002 7:24 PM
> > >Subject: [TechAssist] Re: RCA CTC187AD 220Volts?????? SHOCKED!!!!!
> > >
> > >
> > >>
> > >> I am showing my ignorance here as well. I was not aware that a
> > CTC187AD
> > >> would work on 220v. Is that a overseas chassis? I think I have
> > worked on
> > >> many CTC187AD's, I know I have worked on many CTC187's. This is
> > shocking
> > >> news. Maybe all CTC187's work on 220v. Is the power cord special.
> > It
> > >should
> > >> be huge according to my dryer's plug. Does it have two power
> > cords, one
> > >for
> > >> 115v and one for 220v? This is the biggest news I have heard in a
> > long
> > >time.
> > >> I never knew this, I am shocked.
> > >>
> > >> Perry
> > >> www.electricmedic.com
> > >>
> > >> -----Original Message-----
> > >> From: Philip Bader [mailto:tjanphyl@xxxxxxxxxxxxxxx]
> > >> Sent: Wednesday, December 18, 2002 8:55 AM
> > >> To: tv-repair@xxxxxxxxxxxxxxx
> > >> Subject: Re: [tv-repair] RCA CTC187AD / C27521 whine
> > >>
> > >>
> > >> I am showing my ignorance here, but is this set designed for dual
> > line
> > >> voltages?
> > >> If so, I would concentrate on the small electrolytics around the
> > >> smps(STK regulator caps) for a start.Last, did you use the correct
> > >> suffix # for the STK? (Was original a -090?)
> > >> Phil Bader
> > >>
> > >> "Brian Dorset " wrote:
> > >> >
> > >> > Hello All
> > >> > Just replace regulator (stk730-090) and CR4106 for a dead
> > set
> > >> > symtom. Now it works find except when you plug it into 220V,
> > turn on,
> > >> > then turn it off, you will get an annoying squeal from the power
> > >> > supply. Squeal will go away when power is on and return when
> > set is
> > >> > off. Set does not do that on 120V. Any suggestion will be
> > >> > appreciated .
> > >> >
> > >> > Brian Dorset
> > >> > Brian's Electronix Services
> > >> > Mt Grenan Village
> > >> > St Vincent.West Indies.
> > >> > TEL: 784-458-9847
> > >> > FAX: 784-458-9847
> > >> > E-mail: bes@xxxxxxxxxxxxx
> > >> >
> > >> >
> > >>
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