> On Feb 25, 2016, at 10:59 PM, rolohar@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
>
>
> I don't think you actually know what the term "isolation" means
> in the context of this discussion.
>
> A power cord plug does not imply isolation. It merely indicates that the device (whatever it is)
> connects to a power source in a rather conventional manner.
That is exactly my point. There is no need for isolation when using autotransformer. Just a safe connecting device. Like a three prong cable to the mains (110V AC), and a three prong outlet for the 220V AC where the european device will be plugged in.
>
> Are you familiar with: Two-pronged electrical appliance plugs with no polarization?
> Two-pronged plugs with polarized prongs?
> Three pronged plugs?
> Ground-Fault Interruption (GFI) outlets?
> And why we have these configurations??
>
> And...............
>
> If "P.D." means "pixie dust" to you............I'm comfortable with that.
> I thrive on flattery and unsolicited praise.
The only meaning that was making sense to me, as written after a name was a sort of a title, but the only title that I could find was Pharm. D. for a doctorate in Pharmacy, which would not qualify for expertise in Isolation (except maybe in clean room isolation).
P.D. as Police department does not make sense in this context as well as most of the 218 acronyms using PD.
as listed in
http://www.abbreviations.com/Pd >
> Suggestion: There a number of videos on YouTube about the subject.
> Sit for a few minutes and view some of them.
Youtube, as well as wikipedia are not reference sources. They can be right or wrong as they are very loosely controlled for that purpose.
>
> Also, try to comprehend the significance of "ISOLATION" in the context of electrical power sources and
> the application of electrical power to an electrical device.
>
Isolation as electrical power sources are concerned is not required by UL. Only medical devices in contact with a human body require isolation from mains,
I have been working for over thirty years in telecommunications equipment manufacturing, so isolation is something I had to deal with daily for a very long time.
> And.....yes.
>
> There will be questions on both the mid-term and the final exams on this subject.
>
> All the best to you!
>
> Roland F. Harriston, P.D
> ∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
Maybe P.D. stands for Pompous Demagogue that was not in the website listed above
All the best to you too,
Jean-Paul
N1JPL
>
> From: "Jean-Paul Louis louijp@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Thursday, February 25, 2016 7:30:18 PM
> Subject: Re: [Homebrew_PCBs] drill pcb
>
>
> Roland,
>
> I fail to understand why you believe that an autotransformer is less isolated that the mains outlet.
> An autotransformer properly built has a power cord to connect to the local mains, and an outlet for the other voltage.
> What’s unsafe about that?
>
> Please enlighten us, and also tell us what P.D. after your name mean. Is that an acronym for Pixie Dust?
> If you had at least a minimum of engineering knowledge, you would know about LinkedIn which is the largest professional network on the western world Internet.
>
> It you want to check my own credentials, you can look me up on the FCC database with my callsign (N1JPL)
> and on linkedIn under my full name that you will find on the FCC database.
>
> Jean-Paul
> N1JPL
>
> > On Feb 25, 2016, at 7:14 PM, rolohar@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
> >
> >
> > YES!
> >
> > Let's drop it.
> >
> > But...........................stay ISOLATED!
> >
> > Electrically.......that is.
> >
> > Roland F. Harriston, P.D.
> > ∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
> >
> > From: "Will zl1tao@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com>
> > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> > Sent: Thursday, February 25, 2016 5:08:25 PM
> > Subject: Re: [Homebrew_PCBs] Re: drill pcb
> >
> >
> >
> >
> > On 26/02/16 12:59, rolohar@... [Homebrew_PCBs] wrote:
> > >
> > >
> > > What is "LinkedIn" ?
> > >
> >
> > It's for those folks who earn too much money for their brainpower.
> >
> > Can we drop this saga please.
> >
> > Cheers,
> > Will
> >
> >
> >
> >
>
>
>
>
>