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Thread: QRSS and other slow-speed sound card modes

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  1. #1
    Join Date
    Nov 2007
    Location
    Rolla, MO
    Posts
    72

    Default QRSS and other slow-speed sound card modes

    Hello,

    I've made a observation on 30m recently with some online SDRs and a slow waterfall -- QRSS in shapes of normal CW, two tone CW, slashes, triangles, letters, words and even pictures! Very interesting.

    I was wondering if anyone is messing around with the mode...its no quick way to communicate but from what I've read it enables nanowatt transmitters to be heard thousands of miles away!

    What are some good programs to use, and would it burden the finals of a mainstream HF radio for transmitting that long (5 Watts through a TS-850)?

    73
    Sterling Coffey, N0SSC, ARRL Youth Editor, WEEE President and EE Junior
    Missouri University of Science and Technology
    Rolla, MO

  2. #2
    Join Date
    Feb 2010
    Location
    Dallas / Fort Worth
    Posts
    3,692

    Default

    You never run the radio at full output on the digital stuff -- you leave the radio on high power, but adjust the audio drive so the radio is doing 25-33% of it's rated output. This protects the finals and keeps your signal from being wider / trashier than it should be.

  3. #3
    Join Date
    Apr 2001
    Location
    Colorado
    Posts
    1,931

    Default

    WSPR is a good one http://physics.princeton.edu/pulsar/K1JT/wspr.html

    I rarely run more than 1-2 watts, and often just 500mW or even 100mW. No burden to the finals at all!

    Steve

    KV6O
    Signature line removed for your viewing pleasure.

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