Re: HT20 LPF performance

Dave Benson


I have. <g>

The source impedance is 12.5 ohms. That's how the HT is able to put out 5W - there's an impedance transformation in the LPF.

73- Dave

On Mon, Aug 26, 2019 at 9:45 AM Curt via Groups.Io <> wrote:
Has anyone simulated the HT20 LPF?   Using ELSIE to simulate, must be doing something wrong, seeing 3 dB loss at 14 MHz.  Of course a deep 60 dB suppression at 25 MHz.  I am using 50 ohm input and 50 ohm output impedance.   What does the actual output spectrum look like on a scope?  ( I don't own one ).

Curt KB5JO

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