[Elecraft] K3: Need 6kHz filter for wide AM BC reception?

[G4ILO]

Windy Dankoff KM5Q wrote:
> 
> To receive AM shortwave broadcast (at bandwidths wider than 2.7), do I  
> NEED the 6 kHz roofing filter?
> 
> The price list seems to say I only need it to transmit AM (which I  
> don't intend), but it isn't completely clear. The manual doesn't  
> mention it.
> 
You don't NEED it. You can listen to AM in SSB mode by zero beating the
carrier. Some people claim it even sounds better. Even with the AM filter in
"proper" AM mode you'll only get 3KHz audio bandwidth, because the 6KHz
covers both sidebands. The main benefit is you won't hear the whistles as
you tune through the carriers.

-----
Julian, G4ILO  K3 s/n: 222 K2 s/n: 392
G4ILO's Shack: www.g4ilo.com
Zerobeat Ham Forums: www.zerobeat.net/smf
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