On 10 May 2007 19:38:25 -0700, art wrote:

Is this now the end of this thread?

Hi Art,

This latest sub-thread only marks one of your five errors you asked to
be identified.

73's
Richard Clark, KB7QHC

On 10 May, 20:27, Richard Clark wrote:
On 10 May 2007 19:38:25 -0700, art wrote:

Is this now the end of this thread?

Hi Art,

This latest sub-thread only marks one of your five errors you asked to
be identified.

73's
Richard Clark, KB7QHC

Hmm, go ahead, hopefully somebody will still be hanging around.

= 377 ohms (approximately)


Had heard that one wants their stealth fighters to be covered with
material that has this impedance. Also heard that any such material
that can be manufactured is frequency dependent...

On 10 May 2007 20:56:04 -0700, art wrote:

On 10 May, 20:27, Richard Clark wrote:
On 10 May 2007 19:38:25 -0700, art wrote:

Is this now the end of this thread?

Hi Art,

This latest sub-thread only marks one of your five errors you asked to
be identified.

73's
Richard Clark, KB7QHC

Hmm, go ahead, hopefully somebody will still be hanging around.

No need to, they are already enumerated elsewhere. What has been
remarkable about this thread is that its efficiency has peaked at 20%.
- roughly 43.517% above average.

73's
Richard Clark, KB7QHC

On Fri, 11 May 2007 04:41:00 GMT, robert casey
wrote:



= 377 ohms (approximately)


Had heard that one wants their stealth fighters to be covered with
material that has this impedance. Also heard that any such material
that can be manufactured is frequency dependent...

Hi Robert,

It's been around for some 20 or 17 years at least and about as heavy
as the lead apron you wear for dental XRays.

73's
Richard Clark, KB7QHC

robert casey wrote:


= 377 ohms (approximately)


Had heard that one wants their stealth fighters to be covered with
material that has this impedance. Also heard that any such material
that can be manufactured is frequency dependent...

If you want to see proof that what you heard isn't so, go to your local
EMI test facility and ask to see their anechoic chamber. The one I use
is pretty quiet from about 200 kHz up through the microwave range. Under
the carbon-loaded foam cones are thick ferrite plates to extend the
absorption down to the lower frequencies. You can also get ferrite
loaded paint and silicone rubber, both of which have good absorption for
several decades of frequency at least. But as Richard says, they're
awfully heavy.

Roy Lewallen, W7EL

Richard Clark writes:

On 10 May 2007 12:30:13 -0700, wrote:

This thread is turning into one of those fantasies of the Boy's
magazines of the 1950s: "Build a nuclear reactor on your kitchen
table!"

Well, that's not just a fantasy, I'm afraid. See the Tale of the
Radioactive Boy Scout: http://www.dangerouslaboratories.org/radscout.html

I also used to have a picture of Otto Hahn's lab setup when he first
split the atom in 1938. It really looked like a few simple instruments
arranged on a kitchen table.

73
LA4RT Jon

art wrote:
I used to call 377 ohms an impedance
but I am now am agreement with the majority, 377 ohms is a ratio.

377 ohms is both an impedance and a ratio.
--
73, Cecil http://www.w5dxp.com

Sorry people if I step in, but I really don't understand a word of
this thread.
(I'm a telecomunnication engineer though).

On 11 Mag, 04:15, art wrote:

Heh I am agreeing with you, 377 ohms is a ratio pure and simple.
I am now a member of the majority. I used to call 377 ohms an
impedance
but I am now am agreement with the majority, 377 ohms is a ratio.
If Maxwell is part of the majority how can I go wrong. Seems like the
blitz
got in the way of that jewel being passed on.
Art

R=V/I (ohm's law) is a ratio and its dimensional result is ohms.
What's wrong with Zo beeing dimensionally in ohms and beeing a ratio?

Thanks and 73
Francesco IZ8DWF

On Fri, 11 May 2007 09:23:10 +0200, LA4RT Jon Kåre Hellan
wrote:
Well, that's not just a fantasy, I'm afraid. See the Tale of the
Radioactive Boy Scout: http://www.dangerouslaboratories.org/radscout.html

Hi Jon,

WHEW! I knew fiction had to imitate reality somewhere.

73's
Richard Clark, KB7QHC