A correction cap also works for a choke input PS using an old style
transformer with a high Z compared to modern designs.
Carl
KM1H
----- Original Message -----
From: "jeff millar" <wa1hco@wa1hco.net>
To: <amps@contesting.com>
Sent: Friday, March 08, 2013 11:34 PM
Subject: Re: [Amps] Freescale LDMOS devices
On 03/08/2013 04:51 PM, Carl wrote:
So install a power factor correction cap at the mains panel.
Carl
KM1H
Using a power factor correction cap works when the load is a bunch of
inductive motors. But it won't really work for the pulse type load from a
capacitor input filter.
Power meters measure RMS current and RMS voltage. But Watts RMS only equal
V rms x I rms when the power factor is 1. For lower power factors you pay
for Vrms x I rms which is greater than Wrms.
The surplus 50V DC power supplies for LDMOS transistors are always power
factor corrected.
From an operating point of view, the PFC type power supplies cause a lot
less flicker in the lights when operating high power SSB...which could be
either good or bad depending on what you're going for.
jeff, wa1hco
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