[Elecraft] Portable Ops with KX3 along with KXPA100

[Jim Brown]

If you are in a very quiet location with antennas close to the Honda and 
haven't brought other noise sources to pollute your environment, you 
WILL want a serious common mode choke on the AC line. We use Honda 2000i 
with K3/KPA500 for our county expedition to a rare county for CQP 
(California QSO Party).  Noise sources include computers, monitors, wall 
warts, battery chargers, portable refrigerators, etc. We use no SMPS 
wall warts, and choke everything.

The length of AC cable between the Honda and the choke should be as 
short as possible. To get more turns through the choke, make a short 
jumper with the thinnest practical cable and use it to wind the choke. 
#14 indoor wiring cable or #14 appliance cable are a good choice. Wind 
the choke before installing the second connector. Follow the guidelines 
in Chapter 7 of k9yc.com/RFI-Ham.pdf for coax the size as the power 
cable you're using. Use larger diameter and close spaced turns to move 
the resonance lower.

73, Jim K9YC

On Tue,9/20/2016 11:53 AM, David Bunte wrote:
> N9FN and I have operated portable in various state QSO parties using his
> Honda EU2000 with no RF noise we could detect. We often used his KPA500 and
> that generator handled it quite well.