[Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Ken K6MR]

The Anan SDR folks are doing this using an external coupler feeding one of the receivers in the Anan. Google “Pure Signal”, which is their name for the implementation.  I think it’s a VK who is doing the firmware. There are a few YouTube videos showing the end result, and it is really impressive.  The basic concept is pretty simple, but as always the devil is in the details. Way above my pay grade :^)

Ken K6MR


From: 'Stephen Bloom' sbloom at acsalaska.net [Elecraft_K3]<mailto:Elecraft_K3 at yahoogroups.com>
Sent: Thursday, April 20, 2017 11:20 PM
To: Elecraft_K3 at yahoogroups.com<mailto:Elecraft_K3 at yahoogroups.com>
Subject: RE: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply


Ken:

How would one implement this.  I know that the real weak spot amongst the high power solid state amps available to the Amateur community has been high IMD, due to what I understand are limits to the existing DMOS chips.

Thanks/73
Steve KL7SB


From: Elecraft_K3 at yahoogroups.com [mailto:Elecraft_K3 at yahoogroups.com]
Sent: Thursday, April 20, 2017 8:48 PM
To: Elecraft_K3 at yahoogroups.com
Subject: RE: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply


The Elecraft folks should be in charge of government secrets… nothing would ever leak  :^)

One interesting item in the rear panel photo: Tx Sample.  Output for “Pure Signal” style IMD improvement using pre-distortion in an SDR radio?

Ken K6MR



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