[Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)

[Joe Subich, W4TV]

 > That said, Flex did issue firmware/software that is said to reduce
 > keying sidebands. I've been trying to coordinate with a local 6700
 > owner to test it here.

While it may address the keying sidebands, it does not address the
phase noise issues.  Flex will never fix phase noise in the prior
generation of hardware (e.g. -123 dBc in the Flex 5000, -120 dBc
in the Flex 3000 per Sherwood).

73,

    ... Joe, W4TV


On 2015-07-01 12:06 PM, Jim Brown wrote:
> On Wed,7/1/2015 5:17 AM, Joe Subich, W4TV wrote:
>> The K3 and Orion transmitters have much less spurious (particularly
>> transmitted phase noise from the K3) than most other transceivers while
>> the Flex is one of the dirtiest according to ARRL Labs.
>
> Yes, ARRL Labs tests are damning, though you would never realize it if
> you only read the text. When is ARRL going to assign technically
> competent authors to these reviews?
>
> That said, Flex did issue firmware/software that is said to reduce
> keying sidebands. I've been trying to coordinate with a local 6700 owner
> to test it here.
>
> 73, Jim K9YC
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