Topband: spark gap construction ideas for 160m tower

[Rob Atkinson]

There are a number of ways of making a ball gap.  but more important
is arriving at the correct spacing for the gap.
The way rain is handled is usually by positioning the balls one above
the other so a water bridge doesn't form between the balls.

Read this by Mark Persons:
https://www.radioworld.com/tech-and-gear/understanding-arc-gaps-for-am-systems
Here's another treatment:
https://www.thebdr.net/articles/steel/twrs/LimitingStatic.pdf
Kintronic sells them
https://www.kintronic.com/shop/tower-ball-gap/

73
Rob
K5UJ