[Elecraft] KX3 Audio Compressor

[David Ahrendts]

Thanks, Gary. I will study up on this. With my really hip (and very effective) headphones, the difference is quite pronounced. I too have always gotten “great audio” comments using the Heil with my about-to-be-sold TS-480HX and TS-480SAT, and I would run pretty full on compression in as full a fidelity as the unit would produce. It was often described as “punchy” and would always push through a pile-up. I fully get the idea that in major contesting, fidelity is not the concern — you wanna be heard. But can’t ya have it both ways without sounding “thin” and “tin-ee.”

David A., KC0XT


> On Nov 11, 2014, at 8:40 AM, Gary - NC3Z <nc3z.gary at gmail.com> wrote:
> 
> This has actually been a topic of several discussions on the KX3 Yahoo group. If you look at the KX3 on a spectrum analyzer you will see that when the compressor is turned on that the TX BW goes from about 2.8KHz to 2.4KHz. I have asked Elecraft if there was a way for another option to be added if one didn't want that narrow of a bandwidth. I unfortunately always get comments that the audio is "pinched" when the compressor is on and many report they hear me better without the compressor, although the audio is weaker. Opposite of all my other radios where I always get unsolicited comments on the great audio.
> 
> Peter HB9PJT just posted on the KX3 group a great QEX article written by W9GR about FlexRadio using Controlled Envelope Single Sideband in DSP producing very effective speech and compression. In reading the article I kept thinking how much greater the KX3 would be if they could implement this. Elecraft, is this possible? Please?
> 
> Gary Mitchelson
> NC3Z Davidsonville, MD FM18
> NC3Z/4 Pamlico County, NC FM15
> http://www.mitchelson.org/
> 
> On 11/11/2014 9:27 AM, David Ahrendts wrote:
>> Feeling rather chuffed to have my Heil Gold Elite 5.1 mich and my Dr. Dre Beats ear buds with my KX3. Could run a disco! The Heil has very broad audio response for amateur radio which I prefer for casual com. I’ve noticed that a ll of that fidelity goes away when I invoke the audio compressor even at level 1. What’s actually happening when the compressor is turned on? Is the audio intentionally shaped differently? Highs and lows clipped off?
>> 
>> David Ahrendts, KC0XT, LA
>> 
>> 
>> 
>> David Ahrendts   davidahrendts at me.com
>> 
>> 
>> 
>> 
>> ______________________________________________________________
>> 
> 
> ______________________________________________________________
> 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 davidahrendts at me.com




David Ahrendts   davidahrendts at me.com