05-01-2021, 07:31 PM
As far as I can gather, there were three pre-war tuning signals used. They are depicted here. One is taken from the F2-layer reception of BBC Television in New York in 1938 and may be a mirror off-screen image. An accompanying diagram attempts to make sense of it.
Is it known in which order they appeared or whether more than one was used at a time?
Steve
Is it known in which order they appeared or whether more than one was used at a time?
Steve
