On Fri, 27 Jan 2006 19:35:16 -0800, Frank Gilliland
wrote:


Good design:

One inch silver pipe

|-- top
|
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| 102"
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|
|-- bottom



Bad design:

Small diameter Stainless steel whip

|-- top
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| 102"
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|-- bottom



You can't make your point so you misrepresent. Like I said before.
You have never shown any reason for me to believe anything other
than you being dishonest.

I have corrected your assumption.

On Sat, 28 Jan 2006 02:59:50 -0500, wrote in
:

On Fri, 27 Jan 2006 19:35:16 -0800, Frank Gilliland
wrote:


Good design:

One inch silver pipe


Silver oxidizes when exposed to the elements, rendering it a poor
conductor in a very short time. Diameter is practically irrelevant at
the power levels we are discussing.


|-- top
|
|
|
| 102"
|
|
|
|-- bottom



Bad design:

Small diameter Stainless steel whip


Stainless steel doesn't oxidize (hence the qualifier "stainless"); and
while it's conductivity is less than that of silver (and the same is
true for chromium), both the diameter and power levels render any
differences insignificant in practical use.


|-- top
|
|
|
| 102"
|
|
|
|-- bottom



You can't make your point so you misrepresent. Like I said before.
You have never shown any reason for me to believe anything other
than you being dishonest.


I don't post test results that defy the laws of physics.


I have corrected your assumption.


You have corrected nothing -- your ideal design is impractical. A 1"
silver pipe? Yeah, that will work just dandy for a 102" mobile whip!








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On Sat, 28 Jan 2006 04:03:36 -0800, Frank Gilliland
wrote:

+Silver oxidizes when exposed to the elements, rendering it a poor
+conductor in a very short time. Diameter is practically irrelevant at
+the power levels we are discussing.
*****

I do believe that silver oxide is the only metalic oxide that is
conductable.

all others are not.

james

On Sat, 28 Jan 2006 02:59:50 -0500, wrote:

+On Fri, 27 Jan 2006 19:35:16 -0800, Frank Gilliland
wrote:
+
+
+Good design:
+
+One inch silver pipe
+
+ |-- top
+ |
+ |
+ |
+ | 102"
+ |
+ |
+ |
+ |-- bottom
+
+
****

Is this silver pipe solid or plated. If solid it is a waste of
material and silver. Thick silver plating will suffice.

Besides diameter of the whip only affects tuning and not radiation
pattern.

+
+Bad design:
+
+Small diameter Stainless steel whip
+
+ |-- top
+ |
+ |
+ |
+ | 102"
+ |
+ |
+ |
+ |-- bottom
+
+
+
+You can't make your point so you misrepresent. Like I said before.
+You have never shown any reason for me to believe anything other
+ than you being dishonest.
+
+I have corrected your assumption.
**********

Stainless steel is a higher resistive material and affects the skin
effect resistance of the antenna. The increase in radiation resistance
does not affect matching but will have a minor affect both receiving
and transmitting properties of the antenna at CB frequencies. At low
microwave frequencies it is a non usable material.

Nickle will do the same thing. My experience with work on small
receiving antennae at 900 MHz and nickle plating over beryllium copper
was a dissaster. Receiver sensitivity degradation was very easily
measured. Quite repeatable.


james