Template:Did you know nominations/Phase plug

Phase plug

 * ... that the first phase plug in a horn loudspeaker was developed in the 1920s by Bell System engineers?
 * Reviewed: Template:Did you know nominations/Roland Bader
 * Comment: Moved from userspace on February 16.

Created by Binksternet (talk). Self nominated at 19:13, 16 February 2013 (UTC).


 * Symbol confirmed.svg Article is new enough and long enough and the hook is well sourced. The image is appropriately licensed. Cwmhiraeth (talk) 20:40, 25 February 2013 (UTC)