"Brad" bradvk2qq at w6ir.com wrote in message
...

"Wayne Jones" wrote in message
.. .
I have used morse code with a key (ve3gqx) but have always wondered how
people sent and recieved code by tapping on pipes etc.
Can anyone explain how this is done? How does one distinguish between a
dot and a dash?

tnx
Wayne
a) They only do it in the movies. It's Hollywood and isn't real.
b) The original telegraph codes used sounders that clicked the code, it
wasn't the same code.

Brad.

Don't tell that to the POWs

Pilots captured and held in POW camps in North Vietnam could communicate
with each other in code while in their cells by tapping on a wall or the
floor.
See URL:
http://shipmodeling.info/morse_code.htm

POW Jeremiah A. Denton sent morse by blinking his eyes -- see URL:
http://dentonfoundation.org/Jeremiah%20Denton.htm




Morse can be sent over radio waves, by a light source, a mirror flashing the
rays of the sun, or tapping on a wall or the floor or any sound method such
as pipes (a good conduit of sound)

I can send code by tapping a pencil on a desk
dot = a sharp tap
dash = a prolonged scrape
Have done it many times in various situations like a company meeting

Or even by tapping code by feel --- tapping my finger on one's palm
such as Thomas Alva Edison did in proposing marriage to Mina Miller see URL:
http://www.ieee-virtual-museum.org/c...=1234723&lid=1



dah dit dit dit dah dit dah dah dit

C.L.