Antenna Tuner (Ultimate Transmatch) from ARRL 1970

www.arrl.org/fi...
A small antenna tuner, I have three of now, but wanted a small one to match my auto-tune tranceiver to the input of my 833A RF amplifier. This one is a lower power tuner good for the 200-300 watt power range and tunes 40 meters to 10 meters. A larger inductor is required to tune 80 and 160 meters.
I might also add that my measurement of the third harmonic (attenuation) is not the same as the third-order-intercept (TOI). Third order distortion is very close to the fundamental frequency and can not be attenuated by filtering of harmonics but it is the best I could do in this video at the moment. Here is a good explanation of TOI. • How to Make Third Orde...