[Elecraft] KPA-500 "Output for Input" schedule?

[Vic K2VCO]

I'm a CW man, so I should keep my mouth shut, but wasn't the "Class A Mode" provided by 
some Yaesu (and other?) transceivers considered a selling point?

Of course their are some 'turn the gain to 11' guys, but there are also those who care 
about how they sound.

Now back to our regular bug sending practice.

On 5/12/2011 11:15 AM, David Gilbert wrote:
>
> How so?  Most hams aren't looking for linearity.  The great majority
> merely want to be heard and understood ... and many don't seem to care
> much about the latter.    If they were they wouldn't have the mic gain
> and compression cranked up beyond all rational measure.   Predistortion
> might have a certain coolness factor to it, but I doubt it would
> generate even a ripple in the marketplace.
>
> Just for grins, where do you usually have your Mic Gain and Compression
> levels set?  What power supply voltage do you run your K3 with, and what
> is your power output setting?
>
> Dave   AB7E
>
>
>
> On 5/12/2011 9:58 AM, Guy Olinger K2AV wrote:
>> That would be a KEEN addition to a K3/KPA500 combo.  Put it way out
>> there and give the industry yet another bone-breaking kick in the *ss.
>
>> On Thu, May 12, 2011 at 12:44 PM, Geoffrey Mackenzie-Kennedy
>> <gm4esd at btinternet.com>   wrote:
>>> Hello Guy,
>>>
>>> The short answer to the first part of your question is yes, and the generic
>>> term for such a scheme is Predistortion. A term that has been used to
>>> identify a Predistortion scheme which employ digital techniques is a
>>> "Digital Predistortion Linearizer" (DPL), and its use can bring about a
>>> significant reduction in the level of IMD being transmitted compared to a
>>> classic class AB design. Unfortunately the relevant data that I have is
>>> packed ready to leave for Luxembourg.
>>>
>>> I don't know how easy or difficult DPL would be to implement in the K3, or
>>> in any other "already designed" rig which employs DSP, but I suspect that
>>> somebody else reading this could tell you.
>>>
>>> 73,
>>> Geoff
>>> GM4ESD
>>>
>>>
>>>
>>> On Thursday, May 12, 2011 at 4:15 PM, Guy Olinger K2AV wrote:
>>>
>>>> I would like to know if some kind of feedback (maybe complicated)
>>>> could bring about a quantum leap in linearity, like sampling the
>>>> output of the amp and feeding that back to the K3 to digitally
>>>> pre-alter the audio to cancel the distortion going out.
>>>
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-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/