On Wed, 22 Jul 2020 10:45:12 +0100, The Natural Philosopher wrote:

What can you get on radio that you cannot get on the internet?

An awful lot of things VHF/UHF: pagers, air traffic, talkbacks (if
there is an OB nearby). HF: weefax, RTTY but pretty much only
weather
data these days all the RTTY foreign press stations have either
gone
or moved to digital (there are a lot of digital signals out
there).

How much of this uses a directional yagi/log periodic on the roof?

All or none, an omni sized for for the frequecies of interest is
better for this general listening rather than having to faff about
with a rotator. Or a discone, a wideband omni. HF just needs a bit of
wire, a few yards will do, hung below the ridge board.

--
Cheers
Dave.