Crystal Set Radio Kit With Full Online Instructions And Transistor Option CBCSRK-1
Crystal Set Radio Kit With Full Online Instructions And Transistor Option CBCSRK-1
Crystal Set Kit Portable Solderless With High Loudness Single Transistor Option
This is a kit of electronic parts which will allow you to build a good crystal set radio using modern parts as detailed in the full instructions provided online:
I have found it to be much better than the commercial plastic kits available thanks to the use of the output transformer and the use of an aerial input coupling coil. All the earphones are tested, something which you won't find elsewhere.
This is the Bill Of Materials:
* 3 Amp terminal strip
* LT44 transformer L2
* variable capacitor VC1
* 2 M2.5 4mm screws
* 3 M2.5 20mm screws
* 3 M2.5 nuts
* 5 M2.5 washers
* BAT48 Schottky diode D1
* 470pF ceramic disc capacitor C1
* ceramic / crystal earpiece Y1
* 30SWG / 0.315mm enameled copper wire 4m
* 1m yellow aerial connection wire
* 1m green earth connection wire
* 1 yellow insulated crocodile clip
* 1 green insulated crocodile clip
* control knob for short shaft
* 50mm long, 9.5mm diameter ferrite rod
* 300mm single core red hookup wire
* 300mm single core black hookup wire
* 1 2.2M carbon film resistor
* 2 100nF ceramic disc capacitors
* NPN BC549C high gain small signal transistor
* Single AA battery holder
All the build information is provided online so that easy updates can be added. There is no paper documentation supplied.
The particular thing that I like about my kit versus so many others, is that if you live in a flat and can't put up a decent long-wire aerial, you can always go on a walk and attach this portable version to two wires on a long farm fence to get a signal.
The kit now comes with all the parts required to add a single transistor for much added loudness and sensitivity. This modification has minimal aerial requirements, so if you can't make the purist crystal set work at your house, the single transistor radio version should get you going. The level of additional complexity is minimal, and you only need one old AA battery to make it work.
You should be able to make this without further assistance if you're aged 14 or above.