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Re: #output #power #qmx QMX High Bands - Tweak Output RF Power #output #power #qmx

 

Good point.

I do have a VNA, but still learning how to use its many functions. I've only used mine so far for SWR antenna checks.

Am I correct that there is some, likely very small, maximum input RF a VNA can accept??


Greg


On Tue, Mar 12, 2024 at 5:40 AM, Marek SP9TKW
<sp9tkw@...> wrote:
The main LPF function is to cut 1st and subsequential harmonics while maintaining as low as possible losses on band in question.

So adjusting only for max power (lowest losses on the band) you can transmit harmonics above permitted level.

I am building QMX now but I would have a ques that connecting nanoVNA to LPF should give you better results and ensure that both power and harmonics are at optimal level. Saying than I am not sure if input impedance of LPF is close to 50ohm. Maybe someone can comment on that.

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73 de Marek SP9TKW

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