Show Radio Short Cuts A reader of at The Standard Exam iner writes write he h made a It loudspeaker of a small megaphone a a piece of bamboo fishing rod and a II pair pall of af After the tb small end nd of af the megaphone had been he says ays he cut a hole halo hoi through gh It just large enough to admit the bamboo bambao the center enter of af which had been notched With these parts to- to together to together gether he h said It was a simple matter to clamp the openings of the phones phanes over aver the hollow barn barn- bamboo boo baa tube The hearing hard may find it comfortable to listen In iii on an tile the phones phanes while the loudspeaker Is operating but refrain retrain from Crom doing loing so because e of th the volume alume A ohm ohm potentiometer used as II a a rhe rheo- rheo rheostat rheo rheostat stat by Inserting It In serIes erles with the loudspeaker and the th phone phane leads heads may be b used as a volume control When a coupled resistance am- am amplifier am amplifier falls fails on an the lower lawer musical notes nates try adding an external can con con- condenser con denser r of at 02 03 or 01 1 to 5 md ca Ca In parallel to the coupling condenser usually of ot the md size Ize If It your aur set wont won't tune to wave wave- wavelengths ave lengths over o meters lengthen your antenna or put a fixed condenser across the areial and ground If It you yau cant can't control regeneration and sharp tuning cLuses causes squealing juggle the detector tube plate volt valt- voltage ae age It may have hav to be reduced reduce i |