For my SOTA activities i build a small Antenna-Tuner with PI-network.
I opted for a T-80 2 Ameridon and 0.5 mm2 copper wire. 2x variable capacitators 140pF + 60pF – switchable fixed capacitator 150 pF Antenna and transceiver side.
The coil has 11 taps. Inductors: 1.14 uH, 1.54 uH 3.54 uH, 6.45 uH …
It is 2 germanium diodes, a 10pF capacitor and a LED. All this fitted in an aluminum housing.