Switching current source for Class A?

[Bigun]

Yes, although there aren't many (at the moment) that deliver more than a couple of Amps

Have things progressed since last year ? would an LED driver be worth trying out ?

I don't need very much power, a lower current might well suffice. For example, I'm currently using a 1W tube amp. At this power level I don't need much above 500mA for SE Class A.

e.g. http://www.recom-international.com/pdf/Innoline/RCD-24.pdf

Nevertheless, the idea presented in this thread is very interesting - I have 4 boxes that were destined for SE Class A which were never finished because the heatsinks weren't 'man enough' - the switching current sink might be my way out...

 

[ontoaba]

It depend on how fast that LED driver could manage the voltage changing (slewrate) it seems that devices using some output capacitors.