"David Robbins" wrote in message ...
sorry, no scanner here.

how do you get rho1? please give me the Zo and Zl to try out, i have been
playing for a while with the basic equations and haven't found a case where
either formulat gives rho1.

and of course if |rho|=1 then swr can never be negative.

I think Reg put it best:

"Dear Dr Slick, it's very easy.

Take a real, long telephone line with Zo = 300 - j250 ohms at 1000 Hz.

Load it with a real resistor of 10 ohms in series with a real
inductance of
40 millihenrys.

The inductance has a reactance of 250 ohms at 1000 Hz.

If you agree with the following formula,

Magnitude of Reflection Coefficient of the load, ZL, relative to line
impedance

= ( ZL - Zo ) / ( ZL + Zo ) = 1.865 which exceeds unity,

and has an angle of -59.9 degrees.

The resulting standing waves may also be calculated.

Are you happy now ?"
---
Reg, G4FGQ


If it were not for Reg pointing out this example, i wouldn't have
researched and corrected my original, "purely real" Zo post with the
more general conjugate Zo formula.

And i researched it because i knew that you cannot have a R.C.
greater than one for a passive network (you can only have a R.C.
greater than one for an active network, which would be a "return gain"
instead of a "return loss"), so i knew that when Zo is complex, my
original post must have been wrong.


Intelligent people can be close-minded, that is for certainly, in
which case, their intelligence is blunted.



Slick

On 3 Sep 2003 23:16:39 -0700, (Dr. Slick) wrote:


I think Reg put it best:

Hi OM,

If you are going to quote him as an authority supporting you, you
should at least accept his offer of a bridge to settle this hash
shouldn't you? You can't run far on one legged stilts.

73's
Richard Clark, KB7QHC

Richard Clark wrote in message . ..
On 3 Sep 2003 23:16:39 -0700, (Dr. Slick) wrote:


I think Reg put it best:

Hi OM,

If you are going to quote him as an authority supporting you, you
should at least accept his offer of a bridge to settle this hash
shouldn't you? You can't run far on one legged stilts.

73's
Richard Clark, KB7QHC


Who ever said he was an authority?

All he did was open up a can-o-worms by showing
how the "normal" Gamma equation is not always
less than 1 for passive networks, which is good
because i wouldn't have found out about the correct
conjugate equation (when Zo is complex).

But it is wise to pick and choose your fights, eh?

And i'd rather argue with someone who is making
sense at any particular point in time.

Show us a passive circuit that reflects more power than
you feed it (incident), on my Daiwa meter,
and i will be VERY impressed.

I'm be waiting a long time for that schematic....


Slick

On 4 Sep 2003 15:36:28 -0700, (Dr. Slick) wrote:

Richard Clark wrote in message . ..
On 3 Sep 2003 23:16:39 -0700, (Dr. Slick) wrote:


I think Reg put it best:
snip
Who ever said he was an authority?
snip
I'm be waiting a long time for that schematic....


Slick

You're been thinkin' he done put it best and is no authority - uh huh.

Are all such sources of your support held in similar esteem?

I suppose the translation to the greater bulk of what you had to say
is no.

73's
Richard Clark, KB7QHC

Slick:

[snip]
Show us a passive circuit that reflects more power than
you feed it (incident), on my Daiwa meter,
and i will be VERY impressed.

I'm be waiting a long time for that schematic....


Slick
[snip]

That's an easy one... simply connect a negative resistance to the end of the
line.

And don't tell me that negative resistance is not passive!

--
Peter K1PO
Indialantic By-the-Sea, FL.

"Peter O. Brackett" wrote in message hlink.net...
Slick:

[snip]
Show us a passive circuit that reflects more power than
you feed it (incident), on my Daiwa meter,
and i will be VERY impressed.

I'm be waiting a long time for that schematic....



That's an easy one... simply connect a negative resistance to the end of the
line.

And don't tell me that negative resistance is not passive!


I most certainly WILL tell you that! A negative resistance can be found
in a tunnel diode, but you still need to apply a supply voltage to make
it an oscillator.

Negative resistance implies positive feedback, so i would certainly be
an active device.

Ok, show me your schematic, then.........waiting a long time......


Slick