[Elecraft] FM and AM Bandwidth

[Barry N1EU]

I'm seeing 4.1Khz max audio frequency on AM with my 6Khz roofing
filter.  Perhaps Lyle is working a little magic?

73,
Barry N1EU

On Sat, Jan 31, 2009 at 2:00 AM, Joe Subich, W4TV <lists at subich.com> wrote:
>
>
>> 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
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>> -----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
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