[Elecraft] KX2 and Sherwood Eng. RX Performance Ranking?

[Matt Murphy]

I'd be willing to send Rob my KX2 for testing.

73,
Matt NQ6N

On Thu, Mar 9, 2017 at 2:42 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:

> On Wed,3/8/2017 8:41 PM, w7aqk wrote:
>
>> you are right to be concerned about how clean a transmitter is, but there
>> are regulatory requirements about that. If you don't meet those standards,
>> you supposedly can't sell it!!!
>>
>
> Sadly, it goes FAR beyond that.  See my comparison of ARRL Lab data for
> selected popular rigs, some of them in the $10K range.   Some of the most
> expensive are really dirty on CW. http://k9yc.com/TXNoise.pdf  Also look
> at
>
> http://k9yc.com/P3_Spectrum_Measurements.pdf  which consists of
> measurements I've done myself of rigs that were made available to me.
>
> Most of the bad signals I hear are, I think, because someone is running
>> things at "maximum'!
>>
>
> Partly true, but some rigs are FAR dirtier than others. The link about
> concentrates on CW.  Many popular rigs generate splatter in their output
> stage due to poor design of TX ALC. Using ALC between the rig and a power
> amp to set TX power is recipe for splatter and clicks. Mistuning a power
> amp, or failure to match an antenna to the power amp also causes splatter
> and clicks.  See http://k9yc.com/K6XXAmpTalk.pdf
>
> 73, Jim K9YC
>
>
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