View Single Post
Old 30th Jun 2021, 8:49 am   #24
SiriusHardware
Dekatron
 
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: President Lincoln SWR issue "only" when meter inline.

When you have the amp inline, but off, I would imagine there is a pass-through connection so that the SWR meter in the radio only sees the SWR of what is beyond the amp.

When the amp is inline the output of the radio is only connected directly to the input impedance matching circuit of the amp, which may very well present a less than perfect SWR to the radio.

With the setup you are describing the radio SWR meter is measuring the SWR of the input of the amp only, whereas the SWR meter is measuring the SWR of all that follows the amp.

It therefore does not surprise me that the radio SWR meter and the inline SWR meter show different SWR readings in these circumstances. I would be more surprised if they did not.
SiriusHardware is offline