Joe, others,
Even a high power amplifier used in SSB service will consume a limited
amount of energy due to the low duty cycle of SSB transmissions.
Operating from a mobile cannot be compared to for example contest
circumstances.
My experience with the Henry SS750 in the mobile is that the standard
alternator (100 amp) in the vehicle has no problem keeping up with the power
consumption of that amp. In my perception in the design of an effective
mobile high power system the main issue for the power supply is to funish
the current surges needed for SSB service. With one or 2 gell batteries at
the amps terminals that can be solved. So at the end of the day I feel a
hybrid could easily deal with the intermitted use of a high power SSB
amplifier. I'm not so sure about the noise generated by the high power
switchers in the hybrid.
Now the advantage of an induction machine like the Aura Gen is the
availability of 240 V AC @ 20 amps and more.
That permits the use of tube amplifiers instead of low voltage devices.
According to Aura Systems documentation they've delivered plenty of these
units to the US military. (5 kW units)
It's amazing that they can shoehorn an induction machine capable of 240 VAC
@ 20 amps or 30 amps into a OD 309 mm x lenth 163 mm unit.
Another amazing feature is the fact that this power is available at idle
with a very wide powerband.
The way they convert the fluctuating ACfrom the induction machine into a
stable sine wave is something special. On first sight it looks an ordinary
inverter but it actually isn't
Too bad the space near the crankshaft pulley of my 2005 Toyota van with
perpendicular mounted engine block in not sufficient to accomodate this nice
piece of equipment. Perhaps it's gettin time that we in Europe should
convert to full size gas guzzlers like you guys in the US;-)
Cheers, Dick
PA3DUV
----- Original Message -----
From: "Joe Isabella" <n3ji@yahoo.com>
To: "Amps" <amps@contesting.com>
Sent: Friday, October 28, 2005 5:30 PM
Subject: Re: [Amps] Mobile high power
> That's true -- the vehicle charges when you are decelerating, as well as
> when the engine is running. Another heavy load like a high power amp
> would really put a dent in the power budget!
>
> I've always wondered though -- does the gasoline engine have to run for
> the AC or is it run off electric as well?? It would seem that if the
> compressor is engine powered, hybrids wouldn't make a lot of sense in hot
> climates. I know the 100+ degree summers here in North Texas put a big
> load on ACs as they are now anyway.
>
> Joe, N3JI
>
>
> HAROLD B MANDEL <ka1xo@juno.com> wrote:
> The trouble in applying extra battery loads to hybrid vehicles
> might be that the main battery is matched to the car drive
> mechanism such that maximum economy and speed/weight ratios
> would not permit huge appliances without deteriorating the system.
>
> There's no such thing as a free lunch, so I wonder if the charging
> system could keep up with an extra big demand....
>
> Hal
> W4HBM
> On Fri, 28 Oct 2005 07:33:26 +0100 Steve Thompson
> writes:
>> wc6w@juno.com wrote:
>>
>> > If a high power mobile unit is the goal, wouldn't one of the new
>> hybrid vehicles make a good starting point?
>> >
>> > Probably a nice 300V or so battery plus all the generator stuff
>> in place.
>> >
>> >
>> I think it won't be long until 36V is commonplace - won't fix the
>> problem of alternator size for the power, but will make the wiring
>> easier.
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