"Malcolm Stewart" wrote in
message ...
I'd like to try recording birdsong using a microphone at the focus of
parabolic reflector.
Currently, I'm having difficulty thinking of domestic items which I
could
cannibalise for their parabolic shape. Any ideas would be welcome.
Best
I've thought of so far is an old radiant heater with the cylindrical
heating
element at the centre of a spun reflector.

I had ideas about this years ago and considered taking a papier mache
mould of the round end of a spacehopper.