[Elecraft] KX3 KXPA100

[Cady, Fred]

Hi,
There is a power calibration that you can do.  This is from the KX3 firmware notes for KX3 firmware 1.76.  Maybe you can try that.

MCU 1.76 / DSP 1.27, 11-20-2013

* MENU:PA MODE NOW HAS POWER-OUT CAL (P out CAL) SETTING:  This enables 75-W power calibration in TUNE mode. When PWR is adjusted, and "P out CAL" mode is in effect, setting power to 75 watts shows "CAL 75W" on VFO B.

* KXPA100 DRIVE POWER CAL DATA UTILIZED: If the KXPA100's per-band 75-W drive power has been saved at the factory, the KX3 will use it.  If not, the KX3's own per-band amplifier drive data is used (if available). This data is created by setting PA MODE to Pout CAL (see above), then doing a TUNE on each band at 75 W.


Cheers,
Fred KE7X

"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
www.ke7x.com or www.lulu.com 
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide 
(Coming soon: "The Elecraft KPA500 and KAT500 - the K-Line Dream Station")


-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of G7KXZ
Sent: Tuesday, March 04, 2014 10:14 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KX3 KXPA100

Hi All,

I have had my KX3 for some time, just completed a kit KXPA100 with Tuner.

Testing all works well, ATU tunes very well. Audio reports on TX good.

My issue is with the Power out LED's and the Utility program monitoring the power. I do not have an accurate Power Meter Output appears as indicated not to exceed 70W

The LEDs follow the Utility program (makes sense) Can an adjustments be made? 
I am off to EA8 land on Monday......... and would like to run 100w and not 12w !!!

Att On
SWR 1:1
KX3 Dial= 25W
Utility Input= 0.4
Utility Forward= 7
Dissipated= 52
Relected= 0.0

SWR 1:1
KX3 Dial= 50W
Utility Input= 1.2
Utility Forward= 20
Dissipated= 74
Relected= 0.1

SWR 1:1
KX3 Dial= 75W
Utility Input= 2.1
Utility Forward= 36.5
Dissipated= 87
Relected= 0.3

SWR 1:1
KX3 Dial= 100W
Utility Input= 4
Utility Forward= 64
Dissipated= 96
Relected= 0.4

SWR 1:1
KX3 Dial= 110W
Utility Input= 5
Utility Forward= 75
Dissipated= 96.5
Relected= 0.4



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