Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: Prev 1 [2]   Go Down
  Print  
Author Topic: SWR  (Read 12802 times)
W5DXP
Member

Posts: 3639


WWW

Ignore
« Reply #15 on: January 14, 2013, 01:26:52 PM »

OK - that's one! Any more Wink

Some of the early SWR meters, e.g. Heathkit, had a small slotted line that directly sampled the forward and reflected fields. I had a pickup loop, taped to my parallel feedline, with two attached flashlight bulbs that glowed with forward power and reflected power. Does that count?Smiley
Logged
WB4SPT
Member

Posts: 166




Ignore
« Reply #16 on: January 14, 2013, 02:22:27 PM »

OK - that's one! Any more Wink

Some of the early SWR meters, e.g. Heathkit, had a small slotted line that directly sampled the forward and reflected fields. I had a pickup loop, taped to my parallel feedline, with two attached flashlight bulbs that glowed with forward power and reflected power. Does that count?Smiley

Sorry, no.  That's a directional coupler.  My slotted line device demanded that the operator physically move a RF probe back and forth inside a essentially a coax with a slot cut lengthwise.  So, you would move the equivalent of a quarter wave to get the max and min RF voltage on the center conductor.  THen do the division of Vmax / Vmin = SWR.  Can you imaging adjusting your antenna tuner doing all that?  You had it easy, even with the old HK.  Grin

I forgot something.  You can measure the wavelength with the slotted line also. Probably won't get you the accuracy of a HK GR64 even.
« Last Edit: January 14, 2013, 03:09:01 PM by WB4SPT » Logged
Pages: Prev 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!