[Elecraft] Shortwave filters for K3

[Don Wilhelm]

Bill,

The 5 kHz width indicated for AM is the *audio* bandwidth, not the IF.  
The IF bandwidth must be more than 2 times the audio bandwidth for an AM 
signal - so your 12 kHz filter is good. 

Remember that the 6 kHz filter must be used for AM transmit.

AFAIK, most broadcast stations limit their transmitted audio to 5 kHz, 
so you are not likely to obtain much better fidelity than the K3 DSP 
currently allows.

73,
Don W3FPR

Bill Maddock wrote:
> Guys,
>
>   Just got done assembling my second K3 and this one has a 13 Khz
> filter where #1 had 6 Khz - I like to do shortwave listening - thought
> the wider filter would give better fidelity, but DSP only goes
> 5Khz wide is there a mode for this? I assumed with the 13khz roofer
> it would be opened up to 10 khz or more?
>
> Thanks and 73,
>
> Bill  N4ZI  K3 #1059 & K3 #2914
>   
>