It might be interesting to run it with a larger diameter antenna, like four foot wide tower section. That might reduce the Q and slightly increase electrical length.
Other things equal, the radiation resistance stays the same when using a 48" diameter radiator, but the input capacitance changes from 32 pF to 282 pF.
The added capacitance improves the received -3 dB audio bandwidth of the system to 5.1 kHz, but its radiation efficiency and distance to the 2 mV/m radius (for the carrier) stays the same.
RF
