04-06-2021, 02:28 PM
It depends a lot on how portable you wish things to be but my personal approach is (and has been in practice) to follow the lead given by the crystal radio enthusiasts. I would feed the aerial input to an external tuned circuit which would then be very loosly coupled (without wire) to the radio. That way coupling could be varied and obviously there is far more isolation, This would give less likelihood of damping and possible detuning on the radio input circuitry. The main bugbear with this approach is the additional tuning issue of the exterior tuned circuit but I use this approach to good effect with a tuned frame aerial I use.
Tracy
Tracy
