[Amps] Power factor correction on tube amps

[Steve Thompson]

I found these fairly simple guidance notes from the power supply 
manufacturer's association:
www.epsma.org/pdf/PFC%20Guide_November%202010.pdf

which say that most equipment over 75W has to meet specs. on 
harmonic currents, which equates to needing power factor 
correction on higher power items.

Steve
> Hi Peter,
> 
> I had a feeling that the EU regs meant that any switching PSU
> over 100 W had to be power factor corrected. Does this also
> apply to non switching PSUs such as in tube amps, Ameritron,
> Alpha etc. which are imported? The power factor of the average
> amp PSU with transformer, rectifier and reservoir cap is awful.
> Am I missing something here?
> 
> 
> 73 John G3UUT
> 
> On 07/03/2013 10:05, peter chadwick wrote:
> 
> Steve, How much filtering is there to meet EU regs on noise put
> on the mains, and is there any power factor correction
> circuitry? 73 Peter G3RZP