Has anyone tried the new super broomstick receiving antenna for sale on
ebay? I was wondering if it was any good or not.

Probably because he is a new ham, memorized the question pool and has no
idea what a soldering iron looks like or the difference between TV coax and
75 ohm coax is?


"Nic. Santean" wrote in message news:3f2a86d3@shknews01...
Why don't you build one by yourself ?

Nic.

"Bill" wrote in message
.. .
Has anyone tried the new super broomstick receiving antenna for sale on
ebay? I was wondering if it was any good or not.

"J T" wrote in message
...
Probably because he is a new ham, memorized the question pool and has no
idea what a soldering iron looks like or the difference between TV coax
and
75 ohm coax is?



OK, let me get this straight....
It's a good thing to make fun and belittle a newbie who is trying to
learn something?
It's the new ham's fault that the current question pool is too easy for
your liking?
No one without experience should become a ham? (not sure how one gains
experience, but hey, I guess that's not important)

Paul

AB0SI (an extra light who never used a soldering iron until licensed nor
did I know anything about coax until I studied for the exams)

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This is a little bit off the original topic, but I have a question.

Given two unmarked pieces of coax, how do you determine if they're "50
ohm" or "75 ohm" or whatever? Shorting them doesn't work.

Jack.
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Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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Use an antenna analyzer!

At 1/8 wavelength, from either a short or an open, the input impedance
will be purely resistive. The resistive value is the Zo of the line.

DD, W1MCE

Jack Twilley wrote:

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This is a little bit off the original topic, but I have a question.

Given two unmarked pieces of coax, how do you determine if they're "50
ohm" or "75 ohm" or whatever? Shorting them doesn't work.

Jack.
- --
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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"Dave" =3D=3D Dave Shrader writes:

Dave Use an antenna analyzer!

Umm, assume that instead of an antenna analyzer, I've got a VOM.

Dave At 1/8 wavelength, from either a short or an open, the input
Dave impedance will be purely resistive. The resistive value is the
Dave Zo of the line.

Without being able to send a signal, I won't be able to test it?

Jack.
=2D --=20
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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Without any RF test equipment, another way to tell is by physical
measurement of the dielectric and inner conductor diameters. But you'll
need some calipers to do that. If you have piece of marked cable of the
same outside diameter and either impedance for comparison, you can
easily tell the difference -- for the same outside diameter, 75 ohm
cable has a noticeably smaller inner conductor than 50 ohm cable.

Roy Lewallen, W7EL

Jack Twilley wrote:
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This is a little bit off the original topic, but I have a question.

Given two unmarked pieces of coax, how do you determine if they're "50
ohm" or "75 ohm" or whatever? Shorting them doesn't work.

wrote:
It's a good thing to make fun and belittle a newbie who is trying to
learn something?

No newbies allowed. The only people allowed are mean old farts suffering
from prostate problems. :-) Hint: Treat them like a duck treats a flood.
--
73, Cecil http://www.qsl.net/w5dxp



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NO! You can't test it with a VOM. You need a signal with wavelength
[frequency] characteristics.

Someone in your area should have an MFJ 259B. Ask around.

Deacon Dave, W1MCE

Jack Twilley wrote:

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"Dave" == Dave Shrader writes:


Dave Use an antenna analyzer!

Umm, assume that instead of an antenna analyzer, I've got a VOM.

Dave At 1/8 wavelength, from either a short or an open, the input
Dave impedance will be purely resistive. The resistive value is the
Dave Zo of the line.

Without being able to send a signal, I won't be able to test it?

Jack.
- --
Jack Twilley
jmt at twilley dot org
http colon slash slash www dot twilley dot org slash tilde jmt slash
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Dave Shrader wrote:
At 1/8 wavelength, from either a short or an open, the input impedance
will be purely resistive. The resistive value is the Zo of the line.

Don't you mean purely *reactive*, Dave, like 0+jZ0 or 0-jZ0?
--
73, Cecil http://www.qsl.net/w5dxp



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