[Elecraft] Son of K3??

[Karl Marderian]

Oh, it is mostly over my head, but thank you for the explaintion. My  
frist transceiver was a Kenwood. They were at one time one of the  
best. Maybe Elecraft has started a new apporach to transceivers.
N6XVT 73

Sent from my iPhone

On May 16, 2010, at 6:38 PM, "Geoffrey Mackenzie-Kennedy" <gm4esd at btinternet.com 
 > wrote:

> No criticism of Elecraft nor the K3 was intended, besides I do not  
> have any good hard data as to the receive signal handling capability  
> of the K3's DSP sub-system.
>
> What triggered my comment was that the TS-590 is said to use only  
> two roofing filters and it is claimed by the manufacturer that "it  
> has the best receiver specs out there". If it is a superhet, this  
> sounds suspiciously like a receiver that uses a H-Mode mixer, high  
> IIP3 roofers, and a "strong" IF. The H-Mode is a type of mixer which  
> appeared more than 15 years ago and yields very good  "IMD"  
> performance, better than most, and as far as I know is not yet used  
> in commercial amateur receivers - I don't know why not.
>
> It will be interesting to see whether or not the designers of the  
> TS-590 receiver have used a proper Gain Distribution analysis to  
> obtain optimum IMDDR3 performance, which should include every  
> "stage" or element in or which impacts on the signal path, this  
> includes L-C filters, crystal filters as well as LO phase noise. It  
> will also be interesting to see their approach to the LO, because a  
> PLL based synthesiser whose cost is within budget would probably be  
> too "noisy".
>
> All should be evident from the schematic when and if it becomes  
> available.
>
> 73,
>
> Geoff
> GM4ESD
>
>
> On Sunday, May 16, 2010, at 11:30 PM, Karl Marderian <karlmar at sbcglobal.net 
> > wrote:
>
>> For me and all others (I maybe the only one). Does this imply the
>> enginreers at Elcraft need to do some brushing up on designing of  
>> DSPs.
>> Are you saying their heterodynes aren't would they should be.
>> N6XVT 73
>>
>> Sent from my iPhone
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