[Elecraft] K3 AM operation with "FM" roofing filter?

[Don Brown]

Hi

The short answer is - YES

I have the FM in slot 1 but do not have the AM filter. I have the 2.8 Khz in 
slot 3 and the 400 hz filter in slot 4.  I get 3 KHz bandwidth with the FM 
filter on AM broadcast stations.  If I crank the bandwidth above 2.8 Khz the 
K3 switches to the FM filter but it is limited to 3 KHZ with the current 
firmware.


Thanks

Don Brown
KD5NDB

K3 S/N  0575

--------------------------------------------------
From: "ab2tc" <ab2tc at arrl.net>
Sent: Saturday, April 12, 2008 4:24 PM
To: <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] K3 AM operation with "FM" roofing filter?

>
> Hi,
>
> I am still confused as to whether I can *receive* AM with the FM roofing
> filter with the *current* firmware. Can someone please give me an
> authoritative answer on this? I have just received the FM filter and the
> included note seems to imply that I have to wait for an firmware update. I
> am not asking whether I can get more than 3kHz audio BW on AM with but 
> just
> simply if it will work?
>
> Knut - AB2TC
>
>
> wb8yqj wrote:
>>
>> So would operation without the AM filter be bad enough
>> to roughly approximate, say, a Heath DX100? Just about
>> the same as would suit me just fine but if not maybe I
>> need a wider filter? My guys are hard to please and I
>> know they're not going to be happy with the new rig's
>> weight already. ;-)
>>
>> =====
>>
>> I've not put this on the FAQ yet, but yes you can use
>> the FM filter for AM. But be advised it will degrade
>> performance some with reguard to selectivity. In
>> transmit, the DSP will work with the filter and
>> determine the TX BW.  The exact specs on this are not
>> yet available.
>>
>> 73
>> Greg
>> AB7R
>>
>>
>>
>> _______________________________________________
>> Elecraft mailing list
>> Post to: Elecraft at mailman.qth.net
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>>  http://mailman.qth.net/mailman/listinfo/elecraft
>>
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
>>
>>
>
> -- 
> View this message in context: 
> http://www.nabble.com/Re%3A-K3-AM-operation-with-%22FM%22-roofing-filter--tp14077620p16656659.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>