Some people aren’t quite sure how easy it is to tune a mono-band quarter wave. They are cheap and extremely easy to build.
Here’s how:
Youtube
How to build a low-band (40m, 80m and 160m) antenna
An inverted L is just like a vertical apart from the fact that instead of going straight up (like a tuned quarter-wave), it turns 90 degrees somewhere.
You might like this one: