RHF wrote:
The Grundig Satellit 800 already has a built-in Pre-Amplifier
that is used with the built-in "Mega Size" Whip Antenna.
{ The Built-in Whip Antenna is an Active Antenna. ]

I have a Sat 800 and an outdoor 20-meter random wire. I keep
the whip extended and disconnect the outdoor wire when there
are storms, etc. So I am often comparing the performance of the
radio on the whip vs. the wire.

The 800 is the best-performing radio off the whip of any of the
dozens of SW radios I have. While using the outdoor wire will
usually get me an S-unit or 2 better signal strength, and a bit
less noise (there's a little hum when using the whip), for the
vast majority of the program listening I do, the whip is quite
adequate. I wouldn't expect any other indoor antenna to give
me anything better.

Now, I am in an old brick-and-wood house. If you are in a
steel-frame building or an apartment with many different
noise sources next door, your experience may differ.

73, Will