12:4712:47, 8 October 2022diffhist+5
Radio receiver
→The first vacuum-tube receivers: Reference did not state that audions specifically were used for further amplification. De Forest's audion was actually useless for amplification because it had a very very non-linear characteristic. De Forest later made vacuum tubes as well but claimed they were audions as he did not understand the difference but wanted to claim patent infringement.
17:0717:07, 5 October 2022diffhist0
1080i
The field sequence in 1080i digital format is even field first followed by the odd - to match the NTSC specification for analogue video from which they were originally derived. More details on the
talk page.