Probably a coincidence, Karl, 80 and 160 work better when the sun is low or set so signals will tend to improve near sunset and deteriorate as the morning progresses. Last night when I worked John GX0OOO/P on top band he was barely workable at first but steadily improved as the sun got lower.
Reminds me of a study that I saw once that produced graphs showing the increasing number of mobile phone masts and other graphs showing the decreasing number of sparrows. I bet you cannot guess the (unsupported) conclusion?
Well it’s exactly the same as satellite TV and AIDS. During the early 80 to mid 80s there was massive growth in the number of people contracting AIDS, mainly gay but straight as well. What was appearing all over buildings at the same time? Satellite TV dishes. They are obviously the cause.
Any heating of toroidal loading coils in use would be a Bad Thing… either due to the wire heating due to it being inadequate for the current it was carrying, or core heating due to losses in the core beyond it’s ratings… losses from both causes likely to increase with increasing temperature…
As Brian says, the phenomenon you observe is more likely due to the vagaries of propagation.
Karl, in basic propagation theory (and also in practice I have found) top band signals should increase as dusk goes into night as the D layer fades, providing sky wave reflections. Signals should decrease after sunrise as the D layer forms and the signals are absorbed by the D layer in the sky above the operators locations.
Ok thanks for that.
Just seemed strange when heard from time they started to a few minutes later,s after few minutes of broadcasting and good one about the changing of the propagation with falling of dusk or even dawn.
Sparrows, few less, no one will miss them.
100 black birds in a pie. Christ how many sparrows required to fill same pie then