Michael wrote:

Quick question here...

I've read about LDE a number of times and have even heard Art Bell talk
about it on Coast To Coast.

I've been thinking that it might be a product of the electronic equipment
itself, rather then any kind of outlandish atmospheric/propagation
condition.

My question... Has LDE ever been noticed or logged prior to the days of
solid state and computer chip rigs ??? I'd love to know the first known
observations of this phenomenon.

Any help on this question would be enormously appreciated.

I can remember operating CW in 1970 or 1971 in the 40 meter band and being able
to un-key and hear my own signal, or part of it.

dxAce
Michigan
USA