Carl very good points.
In the world of digital audio, we call this effect "clock jitter".
Nothing new, just fact of life. Hence the reason most digital audio
system use a switching PSU. Plus, it's easy to lock the digital clock
and the PSU switching rate together. Hence, no jitter.
73
Bob K4TAX
Carl Moreschi wrote:
>
> I have heard many times on this reflector comments about the CW note on the
> Pegasus
> and now the Jupiter being below par. My experience in using the my Pegasus
> for over a year
> is originally I had a raspy CW note on transmit and all received CW signals
> were raspy
> sounding. What I found was both the 12 volt power supply and computer
> monitor must
> be located at least a few feet away. The 60 hertz power transformers in a
> power supply and
> computer monitor generate magnetic lines of flux that if close enough to the
> pegasus
> or jupiter can cut through the oscillators and cause a poor note on both
> transmit and
> receive.
>
> Once I moved my power supply away from my Pegasus, all is well. My son,
> N4YDU,
> lives about 7 miles from me. He has confimed through direct listening to my
> CW signal
> (and showing a 20db over 9 signal) that my CW note sounds perfect.
>
> I would conclude that anyone that has received reports of a bad CW note on
> their
> Pegasus and Jupiter should make sure that any equipment that has a 60 hertz
> transformer in it, should be located at least a few feet away form the rig.
>
> Carl Moreschi N4PY
> Franklinton, North Carolina
> n4py@earthlink.net
>
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