[Amps] Switching Power Supplies

[Tom W8JI]

> >I can't imagine why an amateur would want to use a 
> >switching supply for a
> filament. What reason is there to do that?
>
> I can think of only one: lower travel weight for 
> DXpedition use.

The filament transformer is typically about 5-10% of overall 
amplifier weight. On a 60 pound amp that's 3-6 pounds. If 
the switching supply cuts that in half, we save 1-1/2 to 3 
pounds.

I think the real advantage is being cheap.

73 Tom