K3 FM filter required for full AM receive width

[Don Rasmussen]

Windy,

The stock K3 comes with one 2.7khz filter and that's a
hardware limitation.

The firmware cannot help this.

So, you will need a 5.0 filter (AM), a 13 filter (FM),
or one of the variable hardware filters that should be
available in the next couple of years from Elecraft.

I use the FM filter and it may also be usable in AM
transmit. I know its good for FM and SWL.


[Elecraft] K3 FM filter required for full AM receive
width
KM5Q km5q at mac.com
Sun May 4 20:19:42 EDT 2008

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--------------------------------------------------------------------------------

Wayne,

In the new firmware announcement you say:

> AM RECEIVE WIDTH RANGE INCREASED
> ...
> NORM selects an IF bandwidth of 6.0 kHz in this
mode. WIDTH settings  
> above 6.0 kHz will not be useful unless you have an
FM-bandwidth  
> crystal filter installed (at FL1).

I like using the K3 for shortwave listening. I would
rather not be  
required to buy the FM xtal filter to get the full
bandwidth on AM.  
Will this change with future revisions?

Windy KM5Q


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[N4LQ-2]

I'm a little confused....Are you saying that eventhough the display says
10kHz, it's really not unless you have the FM filter and if it's not 10kHz,
then what is it if I use the 6kHz filter.   If it's really not then why
display it?

Steve Ellington
[hidden email]
----- Original Message -----
From: "Don Rasmussen" <[hidden email]>
To: <[hidden email]>
Sent: Sunday, May 04, 2008 8:32 PM
Subject: [Elecraft] K3 FM filter required for full AM receive width

> Windy,
>
> The stock K3 comes with one 2.7khz filter and that's a
> hardware limitation.
>
> The firmware cannot help this.
>
> So, you will need a 5.0 filter (AM), a 13 filter (FM),
> or one of the variable hardware filters that should be
> available in the next couple of years from Elecraft.
>
> I use the FM filter and it may also be usable in AM
> transmit. I know its good for FM and SWL.
>
>
> [Elecraft] K3 FM filter required for full AM receive
> width
> KM5Q km5q at mac.com
> Sun May 4 20:19:42 EDT 2008
>
> Previous message: [Elecraft] Re: K3 FW 1.87 SSB output
>
> Messages sorted by: [ date ] [ thread ] [ subject ] [
> author ]
>
> --------------------------------------------------------------------------------
>
> Wayne,
>
> In the new firmware announcement you say:
>
>> AM RECEIVE WIDTH RANGE INCREASED
>> ...
>> NORM selects an IF bandwidth of 6.0 kHz in this
> mode. WIDTH settings
>> above 6.0 kHz will not be useful unless you have an
> FM-bandwidth
>> crystal filter installed (at FL1).
>
> I like using the K3 for shortwave listening. I would
> rather not be
> required to buy the FM xtal filter to get the full
> bandwidth on AM.
> Will this change with future revisions?
>
> Windy KM5Q
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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>
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> Elecraft web page: http://www.elecraft.com
>
>
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> 11:22 AM
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>

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