Re: CW OPERATION

Gordon Gibby
 

9h1avlaw


of course you risk outof band transmissions if you aren't at least able to recognize which WAY your sideband is going, and how close to the band edge you are.....exactly the same is true of upper side band and lower sideband voice opeeration.   


We expect people with the General class or higher license class to understand those sideband type pesky issues...in fact, it is a question or two in the exam packet!    and if you were to use FM...or AM....then you have sidebands on BOTH sides.....so if you're going to be a RADIO amateur you need to understand just a bit about MODULATION.....


Cheers, my friend!


gordon



From: BITX20@groups.io <BITX20@groups.io> on behalf of Lawrence Galea <9h1avlaw@...>
Sent: Monday, September 3, 2018 8:57 AM
To: BITX20@groups.io
Subject: Re: [BITX20] CW OPERATION
 
If you are near the band edge you risk out of band transmissions

On Mon, Sep 3, 2018 at 4:35 AM Gordon Gibby <ggibby@...> wrote:
You can do it the other way around, with the transmitter upset, but then you have to be absolutely certain that the user knows that their transmissions are offset from the dial number.

That’s not terrible, that’s exactly what happens when you’re doing upper or lower sideband, and certainly when you’re doing pseudo CW by injecting an pure audio sinewave signal into a single side band system.  FLDIGI will do that, and you can even rig it so your computer shows your correct transmitting frequency


On Sep 2, 2018, at 22:31, Jim Tibbits <ab7vf1@...> wrote:

Gotta offset,  can't hear em on the carrier

On Sun, Sep 2, 2018 at 7:01 PM W2CTX <w2ctx@...> wrote:

Found this video explaining CW Zero-beating.  So based on this explanation the following is illustrated

for 7.040.000:    Dial displays 07.040.000, you transmit on 07.040.000, and the receive is offset by the

sidetone value.


Of course this is based on the video being correct.


https://www.youtube.com/watch?v=CrC7JmNw1eY


rOb

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