[Elecraft] K3s transmit bandwidth adjustment?

[Bob McGraw K4TAX]

Based on my measurements the transmit frequency response is limited by 
the 2.7 kHz SSB filter.  It is reasonably flat thus +/-3 dB from 400 Hz 
to about 2500 Hz.  My next measurement points were 300 Hz {-6 dB} on the 
low end and 3000 Hz {-6 dB} on the high end or 2700 Hz.

Thus your numbers of 200 Hz to 2900 Hz is 2.7 kHz, otherwise about the 6 
dB points on the filter.  I did not go into the ESSB mode and perform 
any measurements.   These were done in DATA mode, thus negating TX EQ 
and Speech Processing.  I also did similar measurement with TX ALC OFF 
and in USB mode and in USB with TX EQ set to 0 dB at all frequencies and 
well below any ALC action.

While I'm always reluctant to measure and report transmit frequency 
response of a SSB transmit path, namely because many users not 
understanding what takes place, thus would exclaim "that's horrible 
frequency response"  while in fact just the opposite is true in that it 
makes for darn good sounding audio.

To answer your question, referring to the Elecraft manual and the Fred 
Cady book, I find no way to "adjust" the transmit frequency response 
other than via the TX EQ.   On that point, I will emphatically state "it 
is always better to attenuate a frequency or range of frequencies as 
opposed to boost a frequency or range of frequencies".

73

Bob, K4TAX



On 2/10/2018 12:04 PM, Michael Blake wrote:
> Using normal SSB with the stock 2.7kHz. wide crystal filter is there any way to adjust the lower and upper bandwidth frequency ranges other than the TX EQ?
>
> For example how would I adjust so that my 2.7 kHz. bandwidth was from 200Hz. to 2900Hz.?
>
> It is easy to do on the receiver but I cannot figure out how to do this on the transmitter.
>
> 73 - Mike - K9JRI
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to rmcgraw at blomand.net
>