Listen to Latest SolderSmoke Podcast

Tuesday, October 11, 2016

The Invention of the Reflectometer: Naval Research Lab Report #3538

Dennis Klipa N8ERF has been doing great work exploring the technical intricacies of the humble SWR meter (and believe me, there are intricacies).   He's also been looking at the history of this invention. 

This summer, Dennis and I came across the April 1964 issue of Popular Electronics.  On pages 74 and 75 of that issue we found a clue that seemed to point to the origins of the device:  the article referred to Naval Research Lab Report #3538 by O. Norgorden,  published on September 15, 1949.  This may be the paper that led to the widespread use of SWR meters by radio amateurs.

Surprisingly, this important paper was not to be found on the internet.  Exhibiting an admirable dedication to the preservation of an important element of the radio art, Dennis wrote to Naval Research Lab and purchased from them a copy of the report.   Unfortunately, the version Dennis got had been copied and recopied so many times that it was hard to read.  So he went the extra mile and re-typed it. 

With his permission, I am giving this article its internet debut by posting it here:

http://soldersmoke.com/SWR N8ERF.pdf

Three cheers for Dennis Klipa for unearthing this important piece of radio history.


5 comments:

  1. Hello
    Spectral reflectometry (SR) is a method of characterizing unknown properties of a sample by measuring the reflection of electromagnetic radiation, or more specifically, light, from an object.Take a look at-Reflectometry

    Thanks

    ReplyDelete


  2. A director can take the help of an accountant who can manage the Reflectometry and also keep the track record of the daily expenses.
    If there is a shortage, he can request the Reflectometry produce to arrange for some more so that he can continue with his task.
    For more information: Reflectometry

    ReplyDelete
  3. Hello....Coating thickness or film thickness analysis is an important process in undertaking the quality testing process of a product or substrate material. It plays a vital importance in analyzing the quality of the product because coating thickness affects the finished quality of a product.ake a look at-Reflectometry

    ReplyDelete

  4. Hi admin,
    I read your blog,I really like it.which is abouot Reflectometry.
    Give your images from your Reflectometry that exotic look by using a film scanner to scan them.
    However, there is yet another essential factor which becomes a major concern for the Reflectometry directors.
    Reflectometry

    Thanks,

    jahaingir alam

    ReplyDelete
  5. Dear Admin,
    I browse your website, its actual impressive, I adulation it.
    I accept collectively this affiliated website.
    Society today, 'Today' achievement accurate as the time from the astern 1980's to the present, has undergone a accelerated change in admonition collection, manipulation, accumulator and presentation.
    Reflectometry
    Best Regards
    Irene Ellison

    ReplyDelete

Designer: Douglas Bowman | Dimodifikasi oleh Abdul Munir Original Posting Rounders 3 Column