[Elecraft] CW Transmit Filter Bandwidth

[Walter Underwood]

As I understand it, the K3 generates a very clean CW signal with DSP. There isn’t anything to filter out.

A narrow filter might add distortion and make things worse.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Aug 21, 2018, at 1:42 PM, Byron Peebles <nz3o.us at gmail.com> wrote:
> 
> Don:
> 
> I do understand it works, since every unit is shipped that way.
> 
> My question is more in the vein of wouldn't using a 1kHz or less filter be safer/cleaner/logical for CW?
> 
> Obviously, not as a factory default, since only one filter is sure to be there, but on a per-user basis.
> 
> I thought years ago (before I had Elecraft) I read that a narrower TX signal made for a stronger signal within that narrower bandwidth.
> 
> 73, Byron NZ3O
> 
> 
> On 08/21/2018 04:33 PM, Don Wilhelm wrote:
>> Byron,
>> 
>> The K3/K3S is designed to use the filter that is installed "stock" in all transceivers, so you need to select the 2.7 (or 2.8) filter for CW (or any other mode except AM, FM or ESSB) for transmit.
>> 
>> Requiring a 1kHz filter for CW transmit would require that filter be included in the basic package and would increase the price of the transceiver.
>> 
>> This sounds like a 'curiosity' question - the K3/K3S works fine with the 2.7/2.8kHz filter for CW transmit.
>> 
>> 73,
>> Don W3FPR
>> 
>> 
>> On 8/21/2018 4:03 PM, Byron Peebles wrote:
>>> I have noticed that Elecraft K3/K3S defaults to setting the wide SSB filter as the CW TX filter.
>>> 
>>> Is there a technical reason for doing this? Would it be better to use a 1kHz filter or one of the narrow CW filters?
>> 
> 
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