🚀 go-pugleaf

On Jan 10, 9:47 pm, Phil Hobbs
<pcdhSpamMeSensel...@electrooptical.net> wrote:
> On 01/10/2012 09:27 PM, George Herold wrote:
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> > On Jan 10, 12:09 pm, Phil Hobbs
> > <pcdhSpamMeSensel...@electrooptical.net>  wrote:
> >> On 01/10/2012 01:47 AM, David L. Jones wrote:
>
> >>> Just thought some might be interested in hearing our recent guest on
> >>> our Amp Hour radio show, Dr Howard Johnson of "Handbook of Black
> >>> Magic" fame:
> >>>http://www.theamphour.com/2012/01/10/the-amp-hour-77-winsome-waveform...
>
> >>> Lots of history of the book, signal integrity, Gigabit Ethernet
> >>> development, 90 degree PCB bends, audiophoolery, and a whole bunch of
> >>> other talk over almost 1 1/12 hours.
>
> >>> Dave.
>
> >> HJ has a mixture of good stuff and complete nonsense.
>
> >> I hope you grilled him a bit about his less sensible stuff, like that
> >> hilariously erroneous video where he attempts to use electrostatics to
> >> demonstrate that ground currents want to flow under traces.  Of course,
> >> the impedance levels are millions of times too high for inductance to be
> >> a factor in that demo, but never mind.    Have a look athttp://www.sigcon.com/Pubs/news/8_08.htmforthe whole ridiculous thing.
>
> >> (The current path is determined by corona discharge at the sharp corners
> >> of the metal squares--if you look at all closely, you'll see that the
> >> discharges always want to go out the corners of the squares.)
>
> >> Cheers
>
> >> Phil Hobbs
>
> > That is pretty silly.
> > But certainly it's a good idea to keep a nice unbroken ground plane
> > under the signal(s) that you really care about.
>
> > George H.
>
> I don't disagree with you there.  But I have small respect for someone
> who makes his living peddling that sort of cargo-cult stuff.  If he ever
> corrected himself, or offered actual real-world data or simulations, I'd
> pay attention.  As it is, his stuff is like an old time medicine
> show--the willow bark tea works, the snake oil doesn't, no apparent
> effort is expended to sort them out.
>
> Remember the little boy in the story:  "Why do you keep snapping your
> fingers, Bobby?" "To keep polar bears away."  "But there isn't a polar
> bear within 2000 miles of here!"  "Works great, doesn't it?"

Grin,  I've never read any of Ho Jo's books.  I figured I don't know
enough to separate the chaff from the grain.
>
> Read Morrison instead.

? Ralph Morrison on Grounding and sheilding?  (the only Morrison on my
shelf) Or someone else?

George H.
>
> Cheers
>
> Phil Hobbs
>
> --
> Dr Philip C D Hobbs
> Principal Consultant
> ElectroOptical Innovations LLC
> Optics, Electro-optics, Photonics, Analog Electronics
>
> 160 North State Road #203
> Briarcliff Manor NY 10510
> 845-480-2058
>
> hobbs at electrooptical dot nethttp://electrooptical.net- Hide quoted text -
>
> - Show quoted text -