Page 123 of 123 FirstFirst ... 2373113121122123
Results 1,221 to 1,226 of 1226

Thread: What did you machine today?

  1. #1221
    Join Date
    Nov 2006
    Location
    durban s africa
    Posts
    1,268

    Default

    Quote Originally Posted by Mike Burch View Post
    Apologies, Plunger. I should have been more explanatory.

    Back in the 1800s, the first telegraphists used the up-and-down or "straight" keys which are still common today. Many of them developed "glass arm", or Occupational Over-use Syndrome (OOS) as we would call it these days. So someone came up with the idea of using a sideways movement instead, and that reduced the problem. Paddles are the most recent (though decades old) iteration of the sideways idea.

    Depending on which of the two paddles is squeezed, a signal is sent to either the dot-maker or the dash-maker in the transmitter, which then forms the actual dot or dash that is transmitted. This has several advantages, not least that the correct dot:dash ratio of 1:3 is automatically achieved—something that's surprisingly hard to do on a straight key.

    If both paddles are squeezed simultaneously, the electronics send alternating dots and dashes. This has given rise to these paddles becoming known as "iambic keyers", from the term for the poetic metrical foot called an iamb—an unstressed syllable followed by a stressed one, such as "The CURfew TOLLS the KNELL of PARTing DAY".

    Despite my having been a ham since 1964, I still have great difficulty in decoding Morse at any sort of useful speed, so I'm not looking to up my sending speed with this gadget. Hams consider it only polite to reply to a call at the same speed, so if I were to speed up my sending I would understand even less of any response!

    Cheers (or "73" in Morse abbreviation parlance),
    Mike.
    Thank you for the explanation. So when I scold my daughter because she is getting sore fingers from texting too much and I tell her that her ancestors never suffered problems like hand over use, I am not totally correct.

  2. #1222
    Join Date
    Aug 2004
    Location
    Sunny So Cal
    Posts
    4,498

    Default

    Quote Originally Posted by plunger View Post
    Thank you for the explanation. So when I scold my daughter because she is getting sore fingers from texting too much and I tell her that her ancestors never suffered problems like hand over use, I am not totally correct.
    Good Morning SA. JR
    My old yahoo group. Bridgeport Mill Group

    https://groups.yahoo.com/neo/groups/...port_mill/info

  3. #1223
    Join Date
    Nov 2013
    Location
    Concord, California
    Posts
    335

    Default

    Good looking paddle, Mike. Looks like it's not likely to slide around on your table with all that heft.

    I've been inactive for years but still have all the gear in a closet. I mostly worked CW and loved my iambic paddle - vast improvement over the old bug (Vibroplex key).

    One thing: I found the most comfortable paddles were close together so my thumb and forefinger were about 1 cm apart, with the spring tension just enough to reliably return the paddles to neutral position. You might find it more comfortable with thinner paddles and the paddle arms adjusted as close as possible.

    -73, KF6R
    There are no stupid questions. But there are lots of stupid answers. This is the internet.

  4. #1224
    Join Date
    May 2015
    Posts
    215

    Default

    I finished up my drive dog plate last week for my Grizzly. I started with a backplate I got from Shars the added a steel top plate to it. It was a series of videos to do the build for my YouTube channel. If your interested here is the links

    https://youtu.be/_PYYjCHx9aU

    https://youtu.be/OTH0j5xwXl8


    Sent from my iPhone using Tapatalk

  5. #1225
    Join Date
    Sep 2008
    Location
    New Zealand
    Posts
    616

    Default

    Quote Originally Posted by plunger View Post
    Thank you for the explanation. So when I scold my daughter because she is getting sore fingers from texting too much and I tell her that her ancestors never suffered problems like hand over use, I am not totally correct.
    Alas, no! OOS has been around a long time in various guises, but does not seem to have been taken particularly seriously until the last few decades.

    The advent of word-processing keyboards has caused a big upsurge in OOS, for two main reasons. Firstly, the old-fashioned typewriter required the operator to pause every few seconds to use the carriage return, shoving to the left a big lever on the end of the carriage. With the automatic line feed of an electronic keyboard, typists never need to pause their typing, so don't get that frequent momentary respite. And secondly, with the advent of computers, blokes can now type as well as women, so there is far more use of keyboards than there was even thirty years ago.

    And now with texting, teenagers are the latest victims. And since they are all ten foot tall and bullet-proof, there's no stopping them!

  6. #1226
    Join Date
    Nov 2017
    Location
    Watford, UK
    Posts
    336

    Default

    Also the old-school typewriters required actual force to drive the keys down so it forced the operator to have their hands in the correct position (wrists up) in order to apply that force. Now with keyboards that are just little rubber domes no real force (or travel for that matter) is required so people let their wrists slouch down and it means the tendons in the wrist are going round a corner rather than being straight.

    Your texting victims will only get it in their thumbs!

    Incidentally, it's called RSI here in the UK. Repetitive Strain Injury. Also Carpel Tunnel syndrome for the wrists.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •