Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old July 5th 05, 01:34 AM
John Smith
 
Posts: n/a
Default

Fred:

"How much string was on ball of string at the beginning" --MINUS--
"How much string is on the ball when you have cut the string off you
need" = L(length of string)

gessh! amateurs really should know that formula!
tongue-in-cheek

I just hate having to unwind the ball, measure the string, then do it
again after cutting!

John

"Fred W4JLE" wrote in message
...
How long is a piece of string?

"redhat" wrote in message
oups.com...
what is the electrical length of a transmission line in degree?

regards





  #2   Report Post  
Old July 5th 05, 03:15 AM
Fred W4JLE
 
Posts: n/a
Default

The correct answer is "No, How Long is a Chinaman"

"John Smith" wrote in message
news
Fred:

"How much string was on ball of string at the beginning" --MINUS--
"How much string is on the ball when you have cut the string off you
need" = L(length of string)

gessh! amateurs really should know that formula!
tongue-in-cheek

I just hate having to unwind the ball, measure the string, then do it
again after cutting!

John

"Fred W4JLE" wrote in message
...
How long is a piece of string?

"redhat" wrote in message
oups.com...
what is the electrical length of a transmission line in degree?

regards







  #3   Report Post  
Old July 5th 05, 04:26 AM
Howard
 
Posts: n/a
Default

On Mon, 4 Jul 2005 22:15:24 -0400, "Fred W4JLE"
wrote:

The correct answer is "No, How Long is a Chinaman"

Yes, his is.
  #4   Report Post  
Old July 5th 05, 01:40 AM
John Smith
 
Posts: n/a
Default

Fred:

I should have pointed out: It is easier and quicker to work with small
balls, than large balls--of string.

The women seem especially good when it comes to this, I am studying
them closely to see why. dirty-old-man-type-grin

John

"Fred W4JLE" wrote in message
...
How long is a piece of string?

"redhat" wrote in message
oups.com...
what is the electrical length of a transmission line in degree?

regards





  #5   Report Post  
Old July 5th 05, 04:30 AM
Hal Rosser
 
Posts: n/a
Default

Take the line outside at night where you can hear crickets chirp.
Count the number of times it chirps in 15 seconds, and add 40.
Thats the degrees. (temperature).
http://www.srh.noaa.gov/elp/wxcalc/f...cketChirp.html
Now measure the transmission line,
Then get a copy of the ARRL Antenna Handbook
or the ARRL Amateur Radio handbook,
and find out why you asked the wrong question.


"redhat" wrote in message
oups.com...
what is the electrical length of a transmission line in degree?

regards





  #6   Report Post  
Old July 5th 05, 07:06 PM
Roger Conroy
 
Posts: n/a
Default


"Hal Rosser" wrote in message
.. .
Take the line outside at night where you can hear crickets chirp.
Count the number of times it chirps in 15 seconds, and add 40.
Thats the degrees. (temperature).
http://www.srh.noaa.gov/elp/wxcalc/f...cketChirp.html


Ummmm..... You have to specify the species of cricket. Each species has a
characteristic chirp factor.
Also are your degrees F, C or K?


  #7   Report Post  
Old July 6th 05, 04:54 AM
Hal Rosser
 
Posts: n/a
Default


Ummmm..... You have to specify the species of cricket. Each species has a
characteristic chirp factor.
Also are your degrees F, C or K?


This is from
http://www.noblenet.org/reference/crickets.htm

The formula for this is to count the number of chirps in 15 seconds and add
39 to calculate the temperature (degrees Farenheit.) If there are 30 chirps
in 15 seconds, the temperature should be about 69 degrees F. This formula is
said to be accurate within one degree. A variation is to count the chirps in
13 seconds, and add 40.
Sources:
"Cricket thermometers," Field & Stream, July 1993, Vol. 98 Issue 3, p21.



and from http://www.almanac.com/outdoors/crickets.php

we have this:

To convert cricket chirps to degrees Fahrenheit, count number of chirps in
14 seconds then add 40 to get temperature.
Example: 30 chirps + 40 = 70° F

To convert cricket chirps to degrees Celsius, count number of chirps in 25
seconds, divide by 3, then add 4 to get temperature.
Example: 48 chirps /(divided by) 3 + 4 = 20° C

===========

there's apparently a small descrepancy (1 degree) in the sources.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
SWR - wtf? Roy Lewallen Antenna 110 July 1st 05 05:30 AM
How to measure soil constants at HF Reg Edwards Antenna 104 June 25th 05 10:46 PM
FYI: NOAA Lightning Safety Awareness Week K4YZ Policy 0 June 8th 05 02:25 AM
physical 1/4, electrical 1/2 wavelength John Smith Antenna 59 March 31st 05 10:53 PM
For the electrical engineers Tdonaly Homebrew 0 September 26th 03 12:51 AM


All times are GMT +1. The time now is 01:46 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017