William Sommerwerck wrote:
What does this have to do with the perceived need
for an RF stage at the receiver?

Read the rest of the posting, it explains why.

I did. It was even more confusing.

Ok, maybe this will make more sense.

Hams either use resonant antennas or antenna tuners.

Resonant antennas by virtue of the fact they are resonant in-band, are not
resonant out of band and therefore reduce out of band signals.

Antenna tuners (for reception) act as preselectors which reduce out of band
signals. In practice and design, they are TRF stages.

So if you buy a ham radio with an antenna tuner, it may not have a tuned
front end as specfied, but in reality it does.

Geoff.

--
Geoffrey S. Mendelson N3OWJ/4X1GM
Those who cannot remember the past are condemned to misquote it.