Hello Chris,
>So in simple terms, does this mean that it is to be expected that the
>G3YXM LPF will NOT work correctly on the W1VD amp? If so, again in
>simple terms please ;) , why?
Markus (DF6NM) has given an excellent expanation in his posting from 7/14/2007:
"...the PI-type combiner per se is not the problem. All I was trying to say is
that you have to prevent it from short-circuiting the
harmonics directly at the output of a (voltage-mode) class-D PA. In that case,
I would recommend a T-type low-pass filter between
each PA and combiner input, starting with a series inductor rather than a shunt
capacitor.
Note that the desired harmonic load impedance depends on the type of Class-D
PA: Voltage-mode class D with rectangular voltage and
sinusoidal current should see a high impedance termination for harmonics, i.e.
an inductor or series resonant circuit. On the other
hand, current-mode class D designs would have sinusoidal voltage and
rectangular current, and require a low-impedance shunt for
harmonics..."
73
Clemens
DL4RAJ
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Chris Wilson
>Sent: Thursday, May 25, 2017 1:25 PM
>To: Clemens Paul
>Subject: Re: LF: Iron dust toroids and heating
>
>Hello Clemens,
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