[Elecraft] KX3 LO injection

[Julian, G4ILO]

Dave KK7SS wrote:
> 
> Just thought I'd ask, as there are two common ways to do it:
> One is to shift the filter passband and the other is to adjust the LO
> injection frequency.
> 
> My IC7200 had the 'hiss' problem. Using IF shift would reduce it but would
> also tend to muffle the audio. Didn't like that. :(
> 

But shifting the LO injection frequency would worsen the carrier
suppression. I used to spend a lot of time fiddling with analog rigs trying
to do the same thing. Got it sounding nice, then noticed that when I keyed
the mic the output meter was showing a reading even though there was no
modulation. :( I run my K3 in SSB with the filter centered on 1.4kHz and it
sounds great to me.

-----
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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