A friend of mine is the proud owner of a TS 440SAT. He want´s to improve the reception of his rig by installing a Inrad filter.
According to www.qth.com/inrad
there are several filters for that TRX. He´s looking for the 2100 Hz SSB filter but which one gives the rig the most improvement?
There are two 2100 Hz filter for 455 KHz (different shape factor) and one for the 8830 KHz stage.
I would say that the filters for the 455 KHz stage are the best because they are in the first stage.
Am I right?
Who can help us out?