[Elecraft] K3 transmitt filter

[Dick Dievendorff]

You can reduce the bandwidth by cutting lows and/or highs with TX EQ. The K3 firmware expects a 2.7 to 2.8 kHz Tx filter, and will probably display an ERR TXF error if you select another.
Your overall objective is fine, I do this by cutting the bottom two audio TX EQ bands to their lowest value. These bands don't help intelligibility of my voice, but they do pick up the fan in my tube amp. 

73 de Dick, K6KR

On Dec 4, 2010, at 8:33, goldtr8 at charter.net wrote:

> Hi Dick
> 
> I was not thinking about shaping but reducing the bandwith to concentrate the transmitt energy.  Kind of like narrow filters for CW.
> 
> I am still new to this hobby and it was just an idea that I had.   Maybe when I finish going thru the extra study guide over the holidays I will know the theory if this was a bad random thought.
> 
> Thanks
> Don
> KD8NNU
> 
> 
> On Sat, Dec 4, 2010 at 11:20 AM, Dick Dievendorff wrote:
> 
>> Tx Filter for SSB and CW and Data must be 2.7 to 2.8 kHz. Better to use TX EQ to shape your Tx audio.
>> 
>> 73 de Dick, K6KR
>> 
>> On Dec 4, 2010, at 8:04, goldtr8 at charter.net wrote:
>> 
>>> If I set up my transmitt filter to use the 2.1 8 pole, would this create any problems.  I am wondering if this would tighten the signal to improve my TX as I am running bearfoot.
>>> 
>>> Thanks
>>> Don
>>> 
>>> 
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