Some of the old CB aerials were vertical with a ground plane quite often and
hams now adapt those for the 10 metre band as it only needs to be a little
shorter.
Often though its a colinear, as they do not need a ground plane.

I'd not worry about the height, very unlikely to get struck by lightning,
for many hears I had a 15ft mast on the chimney with a rotatable five
element fm aerial and a log periodic uhf TV array on top with a two stacked
b group uhf array looking at hannington itv transmitter when itv regions
actually showed different programmes. sob.
Brian

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This newsgroup posting comes to you directly from...
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"Jeff Layman" wrote in message
...
On 29/01/2021 18:11, S wrote:
On 29/01/2021 17:54, Jeff Layman wrote:
On 29/01/2021 16:54, R D S wrote:
https://drive.google.com/file/d/1Mdm...ew?usp=sharing


Dunno, but it looks like it would make a pretty good lightning
conductor.


a FM quarter wave end fed metal rod? Would be about 765 mm long....

? That aerial extends vertically perhaps 4 or 5 metres above the chimney.
I would be surprised if it isn't one of the highest points in the street.

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Jeff