Ampdog
R.I.P. 23 June 2022
The following history might be interesting (this is not a joke):
Sitting at the CSIR tea-table decades ago, a visitor from the Navy related this strange experience. The wave-guide feeding the antenna of the ship's quite powerful radar kept breaking where it made a right angle twist. They kept rewelding it to no permanent avail, until someone made an incredulous suggestion. He offered the possibility of metal fatigue ... as a result of the abrupt change in direction the very large electron current must make! (Folks might know that radar pulses could be 100s of amps for brief periods.)
After everybody exchanged glances, a quarter circle of wave-guide was welded in place of the rectangular bend .... and the wave-guide never failed again.
Was that explanation feasible, or what happened?
Sitting at the CSIR tea-table decades ago, a visitor from the Navy related this strange experience. The wave-guide feeding the antenna of the ship's quite powerful radar kept breaking where it made a right angle twist. They kept rewelding it to no permanent avail, until someone made an incredulous suggestion. He offered the possibility of metal fatigue ... as a result of the abrupt change in direction the very large electron current must make! (Folks might know that radar pulses could be 100s of amps for brief periods.)
After everybody exchanged glances, a quarter circle of wave-guide was welded in place of the rectangular bend .... and the wave-guide never failed again.
Was that explanation feasible, or what happened?