[Elecraft] KXPA100 Mobile Operations -- Power Output

[Phil Hystad]

Matt:

Wow, a Honda Civic -- I think my Hi-Q antenna might tip over a Honda Civic :-)

My vehicle is a 3/4 ton pickup truck, Chevy Silverado HD2500 Crew Cab so I have a large
metal ground available.

Thanks for your comments on your experience so far though. I know that my truck
battery and charging system is pretty good and robust so I am assuming that I should
easily achieve full output on the KX3+KXPA100.

You raise another question though.  What kind of mobile antenna?  Screwdriver?

If a screwdriver antenna, what method do you employe for tuning the antenna
itself.  Currently with my Icom 706 I use the N2VZ Turbo Tuner product but a 
version specific to the Icom 706.

73, phil, K7PEH


On Jan 12, 2014, at 10:26 AM, Matt Zilmer <mzilmer at roadrunner.com> wrote:

> I've started testing the KX3/KXPA100 mobile configuration, but don't
> have all the cabling in yet and it's not permanent.  This KXPA100 has
> the ATU.  Antennas are Hustler on a custom vehicle mount.
> 
> The vehicle is a Honda Civic with a standard 12V electrical system.
> Not seeing any issues with this particular setup.  Wiring to the
> KXPA100 is 8 AWG, with two "transfers" to APPs at a relay enclosure
> for power control in the trunk.  The source is the Civic's battery.
> The KXPA is located in the trunk.
> 
> With the engine running, I am getting 100W.  During key down at full
> power, measured voltage at the amp is showing 12.2V or more (depends
> on whether the regulator decides it's battery charge time, I suspect).
> 
> With the engine off, I get between 11.4 and 11.8V at the amp with
> power set at 60W or below.  Ymmv, because it would depend on the
> battery's state of charge and any other loads on it.  I've run the
> KXPA as high as 60W with battery-only, but I'm still in a test phase
> and waiting on cabling to arrive.
> 
> 73,
> matt W6NIA
> 
> On Sun, 12 Jan 2014 09:47:03 -0800, you wrote:
> 
>> Given the newness of the KXPA100 I am not sure if anyone has put it into a battery driven mobile operation yet.  But, I am still curious about the results and in particular power output on typical automotive 12 volt batteries (under alternator charge).  Assuming the Alternator keeps the voltage up for the KXPA100 is there an expectation that 100 watts can be delivered for mobile operation?
>> 
>> Thanks,
>> 73, phil, K7PEH
>> 
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