Thursday, 27 August 2009

One Transitor Fm Radio

I started making an fm radio, its based on the "radioshack special" only none of the parts are from radioshack as they dont exist here anymore.

i have got the box created and put the speakers/antenna connector/switch and volume knob in, ive also drilled out the front grill although its not very precise. I havent started on the electronics yet, but i have bought most of them in.

heres some pictures




speaker grill was drilled by hand, bit messy but im not fussy.



this is the volume knob, was hardwork getting it inside, i had to remove the speakers.





Its a very tight fit with the speakers inside.





I used a BNC connector for the aerial so i can buy a Radio Scanner antenna and fit that,

ive fitted a rubber duck antenna to it for now as a mockup, but ive ordered a telescopic one from ebay.







soon il start on the electronics.

Update (06/sept/2009)

i now have the antenna and the tuning capacitor, i have also cut the casing (badly using a dremel) where i think the tuning capacitor will be best placed, i got the tuning cap out of an old radio which is broken, its got FM and AM bands although il only be using the FM side i will have to figure out which is which.

2 pictures of the tuning capacitor







heres a pic of the top of the radio, messy dremeling and the antenna, the antenna is a nagoya 144mhz/430mhz model but im sure it will work at 88-108mhz as the original radio called for a piece of copper wire.




i just need to start the electronics, i was going to use stripboard to create the circuit but im having trouble planning it out, it might be easier to use Matrix (pad per hole) board instead, i really dont wanna get a load of chemicals to etch a circuitboard even though it might make it simpler.

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