[Elecraft] Benefits of Buying a Factory Assembled KX3

[Fred Jensen]

On 4/13/2013 5:09 PM, Cady, Fred wrote:
> The roofing filter is actually at AF ahead of AF amplification and
> A/D. So basically it is roofing for the DSP. Pretty amazing.

OK, makes sense.  One thinks [well, at least I do] that roofing filters 
are at the 1st IF, if the 1st IF is baseband then it's there I guess.

The term "Roofing Filter" seems to have sprung [that could be "sprang", 
spellcheck is no help here] up in the 90's.  I didn't realize it was 
originally for the up-conversion schemes of many of the Japanese radios 
to protect the mixer.  Makes sense though.

I have the "stock" filters in my K3, I now have only one local who could 
overload the mixer, and it all just works fine.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org