[Amps] How light can you make a 500W amplifier?

[Rich]

>>From: Steve Katz <stevek@jmr.com>
>>To: 'Rich' <2@vc.net>, Alan Ibbetson <g3xaq@hotmail.com>, AMPS 
>><amps@contesting.com>
>>
>>I don't believe a 1 kg power supply using a 6x multiplier at 50 Hz or 60 Hz
>>is possible, at the current level required
>>
>> > From:	Rich [SMTP:2@vc.net]
>> > The lightest weight power supply would likely be a voltage-multiplier
>> > type operating direct from the electric mains.  With a x6 V multiplier
>> > and 230V mains, c. 1600vdc could be produced for c, 1kg in ps weight.
>
>Although Steve doesn't believe it, 

Steve's 0-volt prediction sounds a tad fishy.  Would it be possible to 
put two quadruplers in series if they were powered by the same source?

>a Pspice simulation suggests that a 6X 
>multiplier using "just enough" 470uF 385v capacitors to keep within their 
>voltage rating (15 in all) and 240v/50Hz mains gives 2KV off load and 1.45KV 
>with 200v p-p ripple at 500mA load. Capacitor ripple current is a tad under 
>3A rms. Peak mains current is 11A, and yes these are horrid spikes so don't 
>tell the power company! My box of 15 caps weighs 750 gr, so Rich's weight 
>estimate seems about right too.
>
>The "nice" way to do it is with a high voltage SMPS. ...


-  Rich..., 805.386.3734, www.vcnet.com/measures.