36/42V systems are appearing in Europe - especially on diesel-powered
vehicles since compression-ignition engines have higher compression
ratios than spark- ignition engines - and that requires requires
greater starter torque. When Volkswagen A. G. converted fro, 6/7V to
12/14V in the 1960s, a number of their engineers argued unsuccessfully
for going to 24/28V, but VW management apparently knew best.
end
On Oct 30, 2005, at 11:15 PM, Dr. William J. Schmidt, II wrote:
> Yes, I too have a couple of 16 x 2SC2879 home brew amps that are
> flawless at
> 1,500 watts out running at 14 VDC. But, it will be nice when higher
> voltage
> car systems appear, as the available higher voltage transistors have
> better
> efficiency.
>
> Sincerely,
>
> Dr. William J. Schmidt, II K9HZ
> Trustee of the North American QRO - Central Division Club - K9ZC
>
> Email: bill@wjschmidt.com
> WebPage: www.wjschmidt.com
>
> "It's not what you take with you... but what you leave behind that
> counts.
> Live each day as if it were your last."
>
>
> ----- Original Message -----
> From: "Philip de Cadenet" <phil@transmittersrus.com>
> To: <amps@contesting.com>
> Sent: Thursday, October 27, 2005 10:29 AM
> Subject: [Amps] Mobile high power
>
>
>> Dick,
>>
>> I'd come across that site and it's listed in my favourites.
>>
>> I know there are lurkers, and some posters to this reflector who
>> indeed
>> have high power mobile experience, far more than myself.
>>
>> Rather than 5Kw+...
>>
>> I still think it's feasible to hit the magic 1500w output off of a 14v
>> DC rail without messing with voltage doubler circuits or 3-phase
>> transformers to run AC amplifiers.
>>
>> Despite what some may think it does not take much to design a very
>> high
>> current 14v DC rail in a mobile suitable for running the US legal
>> limit
>> and some. It's all down to correct charging techniques, suitable
>> battery
>> storage and minimising loses along all the cabling.
>>
>> I have a 16 x 2SC2879 amp which I've yet to fire up in anger. One day
>> I'll install it in a mobile. Plus, the only mains power supply I have
>> (0-20v @ 200A) requires a 3-phase supply which I do not have access
>> to.
>>
>> I do however have a brand new 350A Electrodyne alternator which one
>> day
>> will power this baby.
>>
>> I'd dearly like someone to re-invent the Metron with 16 of these
>> devices.
>>
>> Dissipating all that heat and taming the IMD is your problem:-)
>>
>> " Son of METRON"
>> --
>> Philip de Cadenet G4ZOW
>> Transmitters 'R' Us
>> http://www.transmittersrus.com
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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