I agree with Martin, there would be a schematic (and not just one). The classics are pi- and T-sections.

It's worse with components - variable capacitors and ceramic switches, or rollers.

If there is even a small chance to solve the antenna without a tuner, it is definitely worth considering.

If I understand correctly, will it be an LW fed at the end?

Bands? Power at the end? Middle? Coaxial? Ladder? Radials? Height? Mounting points?

bands HF with a power of 100 W and it doesn't matter which one, I just need some…. so like this..

@OM0AAO wrote:

If I were German, I would scream Hilfe!

Juro, in the technical field, like amateur radio, nothing is trivial. I asked eight questions and have answers to one and a half.

Well, I think judging by the answer we should all start to be afraid.. I don't want to offend the anonymous person, but it looks like someone who wants to show the whole world something without any effort 🙁
So I wouldn't worry too much about the effectiveness of the antenna.

Personally, with this approach, I wouldn't build anything (you can't just get capacitors for 100W somewhere. And the voltages that will appear there with LW/random will be even more interesting).

To anonymous: Don't build anything without knowledge. With your approach, I would recommend going the route of buying a tuner, they start at around 100 Euros.
Or buy some 'antennas that work without a tuner' e.g. OUT-250B D, Diamond BB7V, DIAMOND CP – 6 (these are verticals 4.5m and more) or BB6W which is a 'strange' LW for small spaces. For these antennas, manufacturers guarantee use without a tuner in the specified bands.

The result will be that you won't kill yourself over a homemade tuner and the efficiency will be adequate to the effort spent. And the overall costs will be approximately the same (when I consider the time spent looking for parts and assembling the tuner).