[Elecraft] Swapping Standard 2.7 kHz 5-pole Filter

[David Ferrington, M0XDF]

Thank you, seeing as one of those is mine, I'll encourage you to get on with
the production :-) 


On 29/6/07 16:48, "Eric Swartz - WA6HHQ, Elecraft" <eric at elecraft.com> sent:

> Hi David,
> 
> I'll clarify. We specify globally in the K3 set up menu which filter is
> transmitted through for -each- mode. (Usually set at the factory.) That
> setting determines the TX filter regardless of which RX filter you are
> using. Right now the K3 transmits through the wider SSB filter for
> SSB/CW/Data (or the 6 kHz for ESSB with the DSP setting the actual TX
> b/w), through the 6 kHz filter for AM, and the wider FM filter for FM.
> The ultimate (narrower) TX bandwidths are actually set by the DSP.
> 
> You can use any filter on RX.
> 
> I can't talk much more about this now as were busy with ramping up K3
> production, but we'll update our FAQ to explain this better.
> 
> 73, Eric   WA6HHQ
> ------------------
> 
> David Ferrington, M0XDF wrote:
>> I thought you could transmit via the currently chosen filter - have I missed
>> something?
>> 
>> On 29/6/07 09:05, "elecraft-request at mailman.qth.net"
>> <elecraft-request at mailman.qth.net> sent:
>> 
>>   
>>> Is 2.1kHz really overly narrow for SSB transmit?  I know people are
>>> talking about 1.8kHz filters for RX, and it seems useless to transmit
>>> energy that's not going to be used.  It's certainly wide enough for
>>> data modes.  In fact, it might be useful to be able to TX through the
>>> 400Hz filter in some of those modes.
>>>     
>> 
>>   
> 

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