Hi Claudio,
>...some people can't live without the SWR meter on the
>transmission line: the harmonics not irradiated return toward
>the Tx and the SWR meter show an high value: terrible!!!
>but if you have a LPF the SWR is also high BEFORE the filter
If you have the usual configuration TX->LPF->SWR_Meter->Antenna
the indicated SWR will NOT be spoiled by returning harmonics because
they are attenuated by the LPF and reflected into the TX.
So only extremely weak harmonics make it to the antenna.
Their refeflection by the antenna does'nt change SWR measurably.
73
Clemens
DL4RAJ
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Claudio Pozzi
>Sent: Sunday, January 13, 2019 7:54 PM
>To: [email protected]
>Subject: Re: LF: Low Pass Filtering
>
>On Sunday, January 13, 2019 04:35:19 PM you wrote:
|
