[Icom] Re: Wall Warts

Sun, 27 Oct 2002 08:18:28 -0600

I understand ... a manufacturer just buys a UL listed wall wart; and since 
the output voltage is below  x ( 70 ??)  he does not submit his product to 
UL. Since the PS is already listed.   If you spend the $4000 to get your AC 
product listed ( not approved)  and then you make a small change on your 
product I think you have to resubmit to UL all over again. To avoid this 
problem back in the 70s most all the audio processor companies went to wall 
warts.
Once it was standardized,,,the Pacific Rim started shipping,,, bingo low 
prices.
bill

At 07:01 AM 10/26/02, Ken wrote:
>It's my understanding that manufacturers use wall wart transformers
>because it's (1) cheaper and (2) allows them to work around some
>requirement of the National Electric Code for built in power supplies. Ken
>
>--- Tony Hwang <[email protected]> wrote:
> > Hi,
> > I agree with Brian. I have a small 220V/120V step down x-former plugged
> > into wall for over 2 years to power a DVD  player/karaoke machine  I
> > brought from HL land. It is there all the time.
> > No problem what so ever.
> > Contest time.
> > 73,
> > Tony, VE6CGX
> >
> > Brian Carling wrote:
> >
> > >Actually a lot of professional outfits use them to great effect
> > commercially.
> > >
> > >There is nothing inherently BAD about wallplug-mounted transformers per
> > se.
> > >
> > >If they  are designed well and used within their specifications there
> > is no reason
> > >why they should not function as well as any other transformer.
> > >
> > >On 25 Oct 2002 at 9:08, gary nichols wrote:
> > >
> > >
> > >
> > >>In my brief experience with "Wall Wart" supplies I believe the only
> > >>thing they are good for is recharging batteries...de gary, kd9sv -----
> > >>Original Message ----- From: "Dan R" <[email protected]> To:
> > >><[email protected]> Sent: Friday, October 25, 2002 8:57 AM Subject:
> > >>Re: [Icom] 775-DSP with HM-I mike
> > >>
> > >>
> > >>
> > >>
> > >>>Mike, I have used the wall wart, an SEC 1223 switcher power supply
> > >>>and an Alinco DM-1350 HD supply all with the same results. Have shut
> > >>>down all
> > >>>
> > >>>
> > >>cable
> > >>
> > >>
> > >>>boxes, all lights and every motor driven appliance in the house and
> > >>>the
> > >>>
> > >>>
> > >>hum
> > >>
> > >>
> > >>>is still there. We think it is internal to the MFJ TNC but have not
> > >>>been able to get a scope on it. Good suggestion though as I found an
> > >>>older Icom wall wart I had been using on a hand held that was noisy.
> > >>>73
> > >>>    Dan R
> > >>>
> > >>>
> > >>>----
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> > >>>
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> > >>
> > >>
> > >
> > >
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> > >
> > >
> >
> >
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