[Elecraft] Tight Skirts...

[Larry Phipps]

OK Eric... I just picked up my radio used, and I haven't checked the 
alignment yet... this was just an impression I had. I'll put it on the 
bench and make some measurements before commenting further.

Larry N8LP



Eric Swartz - WA6HHQ, Elecraft wrote:

> We designed the KDSP2 to improve ultimate SSB filter ultimate 
> rejection in the K2.
>
> The KDSP2, with its brick wall SSB filter settings, when cascaded 
> after the KSB2 filter, totally eliminates any residual leakage from 
> strong signals outside the passband. It also tightens the net filter 
> shape factor. The ultimate rejection is 60-75 dB on the xtal filter, 
> which means a strong residual off freq. signal will not activate the 
> K2's AGC, allowing the DSP to do its job without signal degradation.
>
> This is how I run my K2 and I hear no difference with strong off 
> frequency signal blow-by between it and the other $3K+ rigs we have in 
> the lab.  :-)
>
> 73, Eric  WA6HHQ
>
>
> Larry Phipps wrote:
>
>> Sounds like the age old debate in the hifi world about the "sweet" 
>> sound of tube amplifiers vs. the "hard" sound of clearly superior 
>> modern solid state amps.
>>
>> Preferences aside about slopes and shape factors... I'd like to have 
>> MUCH better ultimate rejection... and a true rf clipper would be a 
>> nice addition, especially when using QRP.
>>
>> Larry N8LP
>
>
>
>