XFool wrote:To return to the 1950s. I always treasured the memory of how I picked up Sputnik 1 on short waves on our home radio, confirmed by timing its orbital period. Recently I eventually came across a recognisable picture online of the remembered radio receiver, it was an HMV.
Sadly, looking at it closely, I saw the short wave band didn't go far enough to pick up signals from Sputnik. So bang goes yet another happy childhood memory.
Ah you're assuming that either the rheostat or markings are accurate? And don't discount aliasing!