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Re: K3 transmitt filter

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KD8NNU

Re: K3 transmitt filter

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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Dick Dievendorff

Re: K3 transmitt filter

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, [hidden email] 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
>
>
> ______________________________________________________________
> Elecraft mailing list
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KD8NNU

Re: K3 transmitt filter

In reply to this post by KD8NNU

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, [hidden email] 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
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
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Barry N1EU

Re: K3 transmitt filter

goldtr8 wrote

I was not thinking about shaping but reducing the bandwith to
concentrate the transmitt energy. Kind of like narrow filters for CW.

Limiting the audio bandwidth via EQ will also limit the transmit bandwidth and accomplish what you are trying to do.

73, Barry N1EU

KD8NNU

Re: K3 transmitt filter

In reply to this post by KD8NNU

Hi Barry

Do you have an recommendations for setttings when you want to
concentrate the signal for tough band conditions or dx.

Thanks
Don

On Sat, Dec 4, 2010 at 11:35 AM, Barry N1EU wrote:

> goldtr8 wrote:
>>
>> I was not thinking about shaping but reducing the bandwith to
>> concentrate the transmitt energy. Kind of like narrow filters for
>> CW.
>>
> Limiting the audio bandwidth via EQ will also limit the transmit
> bandwidth
> and accomplish what you are trying to do.
>
> 73, Barry N1EU
>
> --
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Dick Dievendorff

Re: K3 transmitt filter

In reply to this post by KD8NNU

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, [hidden email] 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, [hidden email] 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
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html

Barry N1EU

Re: K3 transmitt filter

In reply to this post by KD8NNU

goldtr8 wrote

Do you have an recommendations for setttings when you want to
concentrate the signal for tough band conditions or dx.

Try cutting the lower 2 or lower 3 bands of TX EQ.

Barry N1EU

Jim Brown-10

Re: K3 transmitt filter

In reply to this post by KD8NNU

On 12/4/2010 8:33 AM, [hidden email] wrote:
> I was not thinking about shaping but reducing the bandwith to
> concentrate the transmitt energy. Kind of like narrow filters for CW.

TXEQ will do exactly that. Go through the archives to see my
recommended settings for common mics.

73, Jim K9YC
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KD8NNU

Re: K3 transmitt filter

In reply to this post by KD8NNU

Thanks for all the guidance gents. I just took the two lowest
frequiences to minimum for a test and wow what a difference in getting
heard in pileups and bearfoot.

I will have to spend time in working thru the best settings for me and
there are archives that I have been pointed too to read up on.

Again thanks for all the help.

Don
KD8NNU

On Sat, Dec 4, 2010 at 4:11 PM, Jim Brown wrote:

> On 12/4/2010 8:33 AM, [hidden email] wrote:
>> I was not thinking about shaping but reducing the bandwith to
>> concentrate the transmitt energy. Kind of like narrow filters for
>> CW.
>
> TXEQ will do exactly that. Go through the archives to see my
> recommended settings for common mics.
>
> 73, Jim K9YC
> ______________________________________________________________
> Elecraft mailing list
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KD8NNU

Re: K3 transmitt filter

In reply to this post by KD8NNU

I give up on the archive search, I never find what I am looking for in
searches.

Don

On Sat, Dec 4, 2010 at 4:11 PM, Jim Brown wrote: