[Elecraft] Wait For The K4 Direct RF Sampled SDR?

[Joe Subich, W4TV]

 > I can't wait to see the Sherwood report on the 6000 series.

Yes, it will be interesting.  I hope Rob can do some notched noise
power testing to see just how well the performance holds up with
real world receive power levels when the receiver is operated in
its multi-band mode (separate, simultaneous receiver "windows" in
multiple octaves).

73,

    ... Joe, W4TV


On 3/14/2013 5:03 PM, wb4jfi at knology.net wrote:
> I love my K3/P3/SVGA and my KX3 as well.  I do want to mention that the
> new Flex 6000 series uses a 16-bit A/D, with over 245Ms/s sample clock,
> much better than 100Ms/s.  Processing gain is real, and should help the
> 16-bit range somewhat, but 16-bits is not really 16-bits in the real
> world.  Throw away at least 1/2 bit, and maybe more.
>
> It will be very interesting to see what a Flex 6000 series finally does
> in various receive parameters, especially dynamic range.  They claim to
> handle a very large dynamic range, even without the various RF filters.
>
> I can't wait to see the Sherwood report on the 6000 series.
> 73, Terry, WB4JFI
>
>
> -----Original Message----- From: Barry LaZar
> Sent: Wednesday, March 13, 2013 10:13 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Wait For The K4 Direct RF Sampled SDR?
>
> I'm sort of curious about what Flex is doing with their new radio. The
> heart of it has to be a very good A/D converter, but the best thing I'm
> aware of is an Analog Devices 16 bit, 100 Msp/s one that ain't exactly
> cheap. To approach the dynamic range in the KX3 and the K3, 16 bits may
> be a might short.
>
> I, too, believe that direct sampling and high dynamic range is still a
> bit off particularly if you want to be able to afford one. I like the
> magic of my KX3 when used with NaP3 and a 24 bit, ASIO compliant sound
> card. As a practical matter, it serves for the 95% situations. those
> last five will include a lightning storm over my house or someone like
> W3LPL moving next door.
>
> 73,
> Barry
> K3NDM
>
>
> On 3/13/2013 9:49 AM, Wayne Burdick wrote:
>> No need to speculate. There is no such project underway at Elecraft.
>>
>> Direct RF-sampling receivers, for all their technology, still lag well
>> behind the K3 in blocking dynamic range, and probably will continue to
>> for years to come. We're quite happy with our superhet architecture.
>> Also, any advancement we make to the K3 will be retrofittable to
>> existing K3s, so your investment is safe.
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>> On Mar 12, 2013, at 8:04 PM, Bob Schumacher wrote:
>>
>>> Given the advances in direct RF sampled SDRs (currently available
>>> QS1R, soon to be released Flex-6000, etc.), Elecraft must be quietly
>>> working on on an RF sampled K4 SDR. Maybe we will see an anouncement
>>> in May at Dayton? I am wondering if I should take the leap with the
>>> Flex or wait for Elecraft? I suspect that Elecraft will provide a
>>> higher value solution. Any speculation on this point by Elecraft fans?
>>>
>>> Thanks,
>>>
>>> W9DBR
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