[Elecraft] FM and AM Bandwidth

[Joe Subich, W4TV]

> I'd love an excuse to spring for a 13Khz roofing filter  ;-)

The 13 KHz roofing filter with 4.2 KHz maximum audio frequency 
sounds quite good now but I'm looking forward to a bit more 
high end when Lyle gets it done.  6 KHz would be a very good 
match to the 13 KHz filter but I'd be happy with 5.5 KHz. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Barry N1EU
> Sent: Friday, January 30, 2009 5:44 PM
> To: wayne burdick
> Cc: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] FM and AM Bandwidth
> 
> 
> On Fri, Jan 30, 2009 at 9:45 PM, wayne burdick 
> <n6kr at elecraft.com> wrote:
> >
> > On Jan 30, 2009, at 1:11 PM, Barry N1EU wrote:
> >
> >> Lyle Johnson wrote:
> >>>
> >>> In the case of AM, we will be increasing the upper audio 
> frequency 
> >>> response.
> >>>
> >> This is good news Lyle.  I've been starting to enjoy what 
> a great SWL 
> >> radio the K3 is and a little more bandwidth will make it even 
> >> greater!
> >
> > Meanwhile, try using SSB to copy AM signals. This uses the same 
> > crystal filter (6 kHz) but allows for around 4 kHz of AF bandwidth.
> 
> Thanks Wayne.  Yes, I do that sometimes!  I also sometimes 
> listen with K3/LP-PAN/Winrad because the 5.5Khz AF and sync 
> detector combo make for real listening pleasure.
> 
> I'd love an excuse to spring for a 13Khz roofing filter  ;-)
> 
> 73,
> Barry N1EU