I just GOTTA ask this question;
The entire by-the-book 'Lightning protection' treatment - on
an itinerantly-operated 2 KW portable Honda generator?
I suppose, esp. if you are intent on operating your Florida-
located Field Day station onward through thunder boomers ...
BTW, it might be made more widely known (I missed
it the first time through) that the Honda EU2000i
(and like models) use a _solid-state inverter internally_
and vary the engine speed _according to load_; they do
not simply govern for 3600 RPM like most gens and create
the output 60 Hz sinusoid _statically_ (i.e., no moving parts)
via electronics, hence the chance the increased (apparently)
RFI experienced.
Quoting: http://qrp.kd4ab.org/1999/990707/0082.html
"Honda has two new lightweight units, the 1000w EU1000i;
and the 3000w EU3000is that I just bought. The little one is
only 28.6 lbs, and the bigger one is 134.5 lbs (both dry
weights). Run times are longer due to a new design that I
will describe shortly. It takes two people to lift the big one;
one hand can lift the smaller unit.
The most interesting thing about these new units, is that they
are inverter-equipped AC output generators. Thus, a load-
dependent speed control adjusts the engine speed to match
the required output to the load(s). There is no conventional
generator bolted to the engine. Rather, a multi-phase AC alter-
nator is incorporated into a new-design flywheel that replaces
the standard flywheel. This multiphase alternator (similar to your
auto alternator design) supplies a solid state electronic control
unit, that produces the required 60 Hz, 120 vac output ..."
- - - -
A ' word to the wise ' for those considering this fine model
series for radio use ...
Jim P / WB5WPA /
----- Original Message -----
From: "Jim Brown" <jim@audiosystemsgroup.com>
To: "RFI List" <rfi@contesting.com>
Sent: Thursday, March 24, 2005 8:49 AM
Subject: Re: [RFI] Honda Generator RFI
> On Wed, 23 Mar 2005 23:42:04 -0800, Michael Tope wrote:
>
> >What am I missing?
>
> See my email from yesterday on this, Mike, when I ran through what
> could happen with impedance added to the ground. The issue is
> lightning protection, and the impedance that gets you common mode
> noise suppression also degrades lightning protection.
>
> As to the filter you have -- you can find a wide variety of filters
> of the CorCom variety, some with a lot more common mode and
> differential mode filtering than others. You may have one that does
> "the minimum" needed to pass EMC testing, but there are better ones.
>
> Jim K9YC
>
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