[Elecraft] K4 model v. K3S for strong nearby signal rejection.

[Bill Breeden]

I asked a similar question at the Elecraft K4 Forum at the Huntsville 
Hamfest this year and came away with the impression that the K4HD would 
be required to meet or exceed the performance of the K3/K3s in this regard.

Since Eric, Wa6HHQ presented the forum and answered my question, he can 
correct me if I came away with the wrong impression.

73,

Bill - NA5DX


On 10/31/2019 9:58 PM, Eric Norris wrote:
> This doesn't answer my question.  Is the K4HD required to provide nearby
> signal  blocking equal to or better than the K3s?  There is no statement
> like this in the FAQ, nor any technical specs.  I'm sure Elecraft has run
> these tests, and I hope they'll share them, or at least give us some idea
> of the relative performance of the various K4 models compared to the K3S as
> regards to nearby signal rejection.
>
> 73 Eric WD6DBM
>
> On Thu, Oct 31, 2019, 3:47 PM Nr4c <nr4c at widomaker.com> wrote:
>
>> Read the FAQ. The K4HD is a K4D with a superheat front end with roofing
>> filters added in front of the ADCs. Like adding a K3 in front of the SDR.
>>
>> Sent from my iPhone
>> ...nr4c. bill
>>
>>
>>> On Oct 31, 2019, at 6:12 PM, Tox <scott.small at gmail.com> wrote:
>>>
>>> K4hd (is a k4(d?) With additional filters)
>>>
>>>> On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft <
>>>> elecraft at mailman.qth.net> wrote:
>>>>
>>>> Can somebody tell me which of the K4 models will produce better blocking
>>>> of extremely strong (S9+20 to S9+40) nearby in frequency signals than a
>>>> K3S?  Is this blocking gain compression?  I'm trying to plan a future
>>>> station upgrade and I have ham neighbors.
>>>> 73. Eric WD6DBM
>>>>
>>>> Sent from Yahoo Mail on Android
>>
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