My absolute favorite! Someone is on the 75 meter band and says: "I'm going down to 160". 160 is UP from 75 and not down. The terms wavelength and frequency are Not interchangeable! They are inversely proportional. As frequency goes up, wavelength goes down and vice versa. Very simple. This question was on my novice test in 1970. You could be on 3900 khz and say I'm going Down to 1900 khz but not say I'm going down to 160. Wavelength is the distance a radio wave will travel, completing a single cycle in one second and not a Nickname for the frequency or band. Ham radio has as many or more slang terms as CB "Good Buddy!". All we had to eat was bologna sandwiches...and that was good enough!