I've found a paper on Phase Noise by Crystek Corporation's VP of
Engineering to be very good in quickly explaining "from the ground up" what
phase noise is, and why it's important. It's 4 1/4 pages long, with many
color diagrams:
http://cheponis.com/ham/Crystek-Phase-Noise.pdf
There is math, but it's at the Technician Class level -- and it is also
given in a step-by-step fashion with no "jumps" from concept to concept.
Maybe you'll find it helpful.
73,
Mike K3MC / 6
p.s. I have no financial or other relationship with Crystek. Just trying
to pass on useful info.
On Sun, May 19, 2013 at 4:13 PM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
> John, I endorsed every word of your post until the last sentence. Then the
> alarms went off.
>
> Rob clearly emphasizes in his presentations that many things contribute to
> making a good receiver and not to only judge a radio by its position on the
> list, but to call it an "extreme rarity" is just as wrong as using the list
> to judge by.
>
> Fundamentally it gets down to a couple of things, like which side of the
> pond do you live on, and if you care whether you might be the 5th guy or
> 155th guy to work a DX station.
>
> Rob also says something in all of his presentations which isn't apparent
> from looking at lists, but it is very important.
> You don't have to have the best radio on the list, your radio just has to
> be
> "good enough."
> Then he explains how much is good enough for CW and SSB (there is a
> difference).
> As long as a radio is "good enough", then your statement was 100% true.
> However it is a pity how many radios are being sold today that simply are
> not good enough.
>
> So although you are very correct in the spirit in which you wrote your
> post,
> there are many transceivers which are so crappy that one should simply
> avoid
> them if he has any competitive interest at all. In the past, this was the
> majority of the rigs. (seriously)/ In the meantime it is only about half
> of
> them. And one HUGE indicator is whether the rig has upward or downward
> conversion.
>
> BTW, none of current Ten-Tec rigs were ever on the list of rigs to avoid.
>
> 73
> Rick, DJ0IP
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of John
> Rippey
> Sent: Monday, May 20, 2013 12:31 AM
> To: tentec@contesting.com
> Subject: [TenTec] RX366
>
> To my way of thinking (and I am not alone), claims of superior performance
> (i.e., close-in 3d order IMD) being the be-all and end-all, are overblown.
> The average ham, such as myself, will rarely, if ever, find himself
> surrounded by 30+ dB over S9 signals even during contests. Years ago, I
> used
> a Jupiter in a contest and found it very satisfactory. Ditto a TS-870,
> etc.,
> etc. In short, there are on the market many transceivers that can give a
> very good account of themselves, even in contests, for us peons.
>
> Of course, the address for this thread is contesting.com, so obviously it
> is
> oriented toward, and attracts, high-power gurus. Nevertheless, an
> occasional
> recognition by such posters of the extreme rarity of the conditions being
> discussed, and radios being judged, would not be out of order, it would
> seem.
>
> 73,
>
> John, W3ULS
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