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Author Topic: Fodder for Zenki - Trashy Ham Transmitters Rated  (Read 2747 times)
KD8MJR
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Posts: 2254




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« Reply #15 on: September 11, 2014, 06:59:53 PM »

Ah it's always good for Elecraft sales when someone insults every other radio owner in order to make a point.  Personally even if those numbers are true I have never noticed this kind of splattering from any particular radio. That being the case I consider all the other factors in my buying decision and when those are factored in the K3 sinks way down on the scale.
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K4PIH
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Posts: 23




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« Reply #16 on: September 17, 2014, 07:45:23 AM »

Wah Wah Wah. Did you communicate? Did people return your call? I cannot remember anyone saying to me "hey, just looked at your signal on my 5000C super duper waterfall O'scope-a-meter deluxe, and your signal has some splatter!"

You want spatter, just wait till I power up the old Swan!
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KD8MJR
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Posts: 2254




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« Reply #17 on: Yesterday at 02:06:58 AM »

Yes it's pretty much getting to the point of diminishing returns.
Numbers this close just don't translate into any major real world difference.
Even the best on that list will drop to the bottom if you don't have your settings just right.
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K1ZJH
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Posts: 975




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« Reply #18 on: Yesterday at 10:12:43 AM »

There seems to be a disconnect between what the K9YC paper says and what some of the conclusions on this thread are. The K9YC test shows transmitter phase noise. The comments here are mostly about IMD. These two things have nothing to do with one another.


Your post makes at least the third time that was noted. Folks read what they want to read.

Multi-station contesters are very concerned about phase noise wiping out adjacent bands--some transmitters are that bad.
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W3RSW
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Posts: 109




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« Reply #19 on: Yesterday at 04:28:50 PM »

The report several times also mentions IM as part of the noise.

Quote
Raw Data -- Spectra With CW Keying – Clicks + IMD + Phase Noise
And,
Quote
ts From Electronic Data: Post-processing of the raw data (Figs 3-5) provides far better resolution, and clearly shows the contribution of phase noise and keying waveshape. Averaging essentially makes the random component of the phase noise disappear. Differences between the rigs remain about the same.
For CW, these spectral plots tell the complete story for what is happening close to the carrier, because they include the effects of keying transients, IMD and phase noise. Because the spectral distribution of pink noise band limited to 100 Hz to 5 kHz closely approximates the spectrum of speech, a comparable, but wider, plot for SSB modulated by that test signal would provide a similar result for SSB.

iPad truncation of copy. Sorry.
« Last Edit: Yesterday at 04:31:47 PM by W3RSW » Logged
K9IUQ
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Posts: 1761




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« Reply #20 on: Yesterday at 05:56:12 PM »

Multi-station contesters are very concerned about phase noise wiping out adjacent bands--some transmitters are that bad.

This is one reason why the Elecraft K-3's are so popular with serious multi-station Contesters and Dxexpeditions.

Disclosure: I do not own any Elecraft and am not particularly attracted to them or the K-3 Fanboys.

Stan K9IUQ
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