[CQ-Contest] Rig Comparisons for Transmitter Noise

[Charles Morrison]

Jim, I apologize but ask for clarity.  In your paper, the CW performance
data for the FT5000 is pre or post installation of this latest firmware from
Yaesu which was dated on the 4th of September?

Thanks
Charlie
N5WE


> 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
> 
> 
> ------------------------------