Well, that is something to consider, but I'm not sure it really is needed.
Allow me to describe my power needs and the physical locations of everything.
I'm running one IC7000. Only 6 meters will be done with full power out at the
radio. I have amps for 2 meters and 432 (200 and 100 watts respectively) and
have ordered the 60 watt output transverter for 222 from Demi. All electronics
will be run off the auxiliary battery which is mounted in the tool box in the
bed of my truck.
The tool box itself is steel. Its not one of those aluminum models. Its big
and very heavy and has only two access holes in the side. I have a 5' tower
section that will be bolted to the side of the tool box in the bed of the
truck. The third leg of the tower will be bolted to a steel cargo divider in
the bed. I have an HD-73 rotor that is mounted on a steel plate at the base of
the tower and an 8' mast sticking out the top. Antennas are the Directive
systems Rover Specials for 144, 222 and 432 and a Parr Stressed Moxon for 50
MHz.
The inverter will be mounted within a couple of inches from the battery inside
the metal box. There will be large ferrite beads clipped on to the lines at
the exit point from the box. The metal box is directly underneath the antenna
array.
I don't see any reason why I would be rotating the antenna while listening, but
I guess that's possible. I will be running the laptop at all times though.
Under these conditions, do I really need the pure sine wave and if so, how
powerful do I need?
Steve
-------------- Original message --------------
From: "dbubke@juno.com" <dbubke@juno.com>
> Steve,
>
> I am transitioning my modest rover setup, just like you, from loops to yagis.
> When I looked at the cost of upgrading my 14V power wiring to supply 25-35
> amps
> (AWG 2 or larger)at 14 volts with minimal loss (0.2volt) and adding an
> inverter
> for a rotor, I decided it was time to take a generator and power supply along
> instead. This is untried in the field as yet.
>
> I ran some tests on RF output of my rigs, at voltages varying from 11.15 -
> 14.2
> volts, and was surprised at the 25% reduction in RF power output at 13.8
> volts
> and 50% reduction at 12.6 volts.
>
> Also tried a well known dc-dc booster to maintain 14 volts. It worked okay at
> loads of 15 amps or less. Not what I need.
>
> Just my 2 cents.
>
> Dan K6NKC
>
> -- k4gun@comcast.net wrote:
> OK... who has a "hash free inverter"?
>
> Steve
>
> -------------- Original message --------------
> From: frank bechdoldt
>
> >
> > Most inverers will create RF hash along with most ac/dc converters for
> laptops.
> > You would need to ask wo has a hash free inverter on the market.
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