[CQ-Contest] Rig Comparisons for Transmitter Noise (Jim Brown)

[XV4Y (Yan)]

Hi Jim,

That's a fantastic work. Thanks!
Great reuse of existing data.
I hope this will be an eye opener for manufacturers.
With the TS-590s and TS-990s Kenwood engineers seem to have understood the importance of it, like Elecraft did.
I hope this will not fortuitous for Yaesu and that with Icom they will apply that even to their low-end rigs.

73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/

Le 8 sept. 2014 à 23:00, cq-contest-request at contesting.com a écrit :

> Message: 2
> Date: Sun, 07 Sep 2014 10:13:00 -0700
> From: Jim Brown <k9yc at audiosystemsgroup.com>
> To: cq-contest at contesting.com, 'cwops' <cwops at yahoogroups.com>
> Subject: [CQ-Contest] Rig Comparisons for Transmitter Noise
> Message-ID: <540C921C.1090209 at audiosystemsgroup.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> Over the last decade or so, Rob Sherwood's extensive work on receiver 
> performance has done much to improve the receivers in modern rigs, but 
> transmitters have been sadly neglected.
> 
> A month or so ago I began work on a project to compare ARRL test data 
> for selected rigs, focusing on the trash they generate. I shared an 
> early version of that work on the Elecraft reflector, and it seems to 
> have found it's way to Yaesu, who has just put new firmware on their 
> website to improve the CW waveform.
> 
> I've done a lot of work on the piece since then, and it's near its final 
> form. If you're thinking about buying a new rig, it should give lots of 
> food for thought.
> 
> http://k9yc.com/TXNoise.pdf
> 
> Also, if you haven't already done so, see the slides for K6XX's 
> excellent presentation on Signal Cleanliness, which, among other things, 
> shows how we can set up and operate our existing rigs to produce a 
> cleaner signal.
> 
> k9yc.com/K6XXAmpTalk.pdf
> 
> 73, Jim K9YC