al Message-
From: W2xj [mailto:w...@w2xj.net]
Sent: Sunday, May 19, 2019 11:56 AM
To: Roger
Cc: j...@audiosystemsgroup.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K4 and Predistortion
With EER a class C or D amplifier can deliver an IMD of at least -80 DB but
with pre-distortion it cou
BW
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
> Sent: Sunday, May 19, 2019 2:09 AM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K4 and Predistortion
>
>> On 5/1
..@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Sunday, May 19, 2019 2:09 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K4 and Predistortion
On 5/18/2019 4:01 PM, Phil Kane wrote:
> Those
> of us with engineering backgrounds knew that
On 5/18/2019 4:01 PM, Phil Kane wrote:
Those
of us with engineering backgrounds knew that what I was referring to as
"pre-distortion" was the pre-emphasis / de-emphasis curves commonly used
in FM broadcast audio chains.
All of which emphasizes the need for using the right words to describe
On 5/18/2019 9:42 AM, Bob McGraw K4TAX wrote:
> Tongue and cheek, .from what I hear on the bands, pre-distortion
> starts with mostly that which comes out of the operators mouth.
> Electronics won't improve this artifact.
For sure! Same with current music. No extra charge for the
Hi Roger,
You wrote "With the radios receiverwise reaching the physical limits it
now is time to pull up the transmitter side to the state of the art as well.
Regarding transmit IMD we are still in the 70s or 80s and sometimes even
worse than that therefore no progress has been made the last
There is an input on the real panel for a “sample” from an RF amp. No
indication that I’ve seen yet on the purpose of this input.
I suspect it may be a while before all is revealed .. :-)
Grant NQ5T
K3 #2091 KX3 #8342
> On May 18, 2019, at 12:42 PM, Bob McGraw K4TAX wrote:
>
> Tongue and
Tongue and cheek, .from what I hear on the bands, pre-distortion
starts with mostly that which comes out of the operators mouth.
Electronics won't improve this artifact.
73
Bob, K4TAX
On 5/18/2019 11:35 AM, Roger wrote:
As there is a lot of buzz going around with the announced K4
As there is a lot of buzz going around with the announced K4 and I have seen
1 or 2 messages on this reflector that referred to "Predistortion" I wonder
if there is any further detail on that. I probably fall out of the regular
scheme as I couldn´t care less about the ability for remote control
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