Most certainly idle minds will play...

"Richard Clark" wrote in message
...

Hi Jimmy,

There are so many things wrong with this sentiment....

Well, since I have a rather large container of the stuff (a couple of
lbs) looking at me all the time on top of my o-scope, it sure is tempting
.... just to say it was done...

...You could never support the column within it as it
would draw a vacuum in its collapse under the influence of gravity
(AKA barometer).

OOPS. Tilt... Er...uh. Don't build it like that. Cap the bottom to fix
this. Leave a little air/vacuum/(a.k.a. mercury vapor) on top if you must
use a glass tube.

.... I wonder what kind of tubing I have around here...
--
Steve N, K,9;d, c. i My email has no u's.

Steve Nosko wrote:

Most certainly idle minds will play...

"Richard Clark" wrote:
...You could never support the column within it as it
would draw a vacuum in its collapse under the influence of gravity
(AKA barometer).

OOPS. Tilt... Er...uh. Don't build it like that.

"Tilt" is very good advice for a variable mercury column.
In fact, the tuning length of the column of mercury could
be controlled simply by tilting the tube of mercury at an
angle away from vertical in the direction of horizontal.
--
73, Cecil http://www.qsl.net/w5dxp



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Cecil Moore wrote:

Steve Nosko wrote:

Most certainly idle minds will play...

"Richard Clark" wrote:
...You could never support the column within it as it
would draw a vacuum in its collapse under the influence of gravity
(AKA barometer).

OOPS. Tilt... Er...uh. Don't build it like that.

"Tilt" is very good advice for a variable mercury column.
In fact, the tuning length of the column of mercury could
be controlled simply by tilting the tube of mercury at an
angle away from vertical in the direction of horizontal.
--
73, Cecil http://www.qsl.net/w5dxp

How much does the length change when you tilt it at 45 degrees?

ac6xg

On Tue, 20 Apr 2004 12:41:55 -0500, "Steve Nosko"
wrote:

Cap the bottom to fix
this. Leave a little air/vacuum/(a.k.a. mercury vapor) on top if you must
use a glass tube.

Hi Steve,

It doesn't work that way. The mercury will create its own void -
thing called gravity and the pressure of the atmosphere around us are
in competition (even if the tube is sealed). Fill it to absolute
capacity (no reservoir) and you will either pop the tube (thing called
thermal expansion) or draw a vacuum.

Pressure, gravity, temperature - all things mercury is sensitive to.
It would be easier to herd cats.

73's
Richard Clark, KB7QHC

Cecil Moore wrote:
Forget about the feasibility of this question for the moment.
Could a column of mercury inside a tube of glass be used as an
antenna?
--
73, Cecil, W5DXP



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It's probably been mentioned before, but there is a group that has
covered liquid antennas in great detail. See -

http://groups.yahoo.com/group/Live-Wire/

Most of the liquid antennas are salt water based, but the idea is the same.

Tom
K0TAR, ex WA2PHW

lots_of_email_addresses@I_already_get_enough_spam. com