When the cap gets too big...

[Toby Paddock]

Magnus Danielson wrote:
>If I recall things correctly did some larger (classic 
>type of powersupply based) power amplifiers in the 
>80thies have a resistance and delayed relay
>in order to bootstrap the caps with a series resistor 
>and after some time the resistor was shortened 
>by the relay and you would see the full line current 

The amp for the vibration test system I use at work does this.
It's fairly large:  1000 water cooled transistors,
water cooled diodes, pulls 250kW input power at full load.
But it's pretty much just a standard amp scaled up a bit.

 - -- -  Toby Paddock