|Project by Grumpy||posted 12-19-2013 12:10 AM||1781 views||4 times favorited||10 comments|
I got sick of the quality of my small cheap AM/FM radio in the workshop and decided to do something about doing my own thing.
I could have went down town a bought a wiz bang blaster but I wanted something different.
I knew that the quality of car radios was generally very good (they have to be otherwise nobody would buy that car.
So that was the starting point.
A friend actually donated a radio he had in is barber shop, a 1994 Mazda 626 Phillips (thanks Frank, a bottle of scotch coming your way). Just what I needed. It had a cassette player which was good because I have heaps of old cassettes.
Next I needed a power supply. This really led me down the wrong garden path. You will see youtube blogs about using a computer power supply to run your 12volt AM/FM tuner. No question you can do this as there is a 12v DC supply (among others) from a PC’s power supply. This seems fine for running CD’s or DVD’s but when it comes to radios there is a different issue. There is a heap of interference to deal with because of the wave pattern produced by the 12v ‘switch mode’ from this source. After much frustration I asked the experts and was told I needed a linear power supply which is what I used and this solved the problem.
I needed some speakers so I grabbed a couple off my wife’s stereo system while she was not looking (LOL). They were just fine for the job.
All I needed now was a casing to put it all together. I used some old shiplap paneling that I would never throw away for the basic structure with some 2×1 supports in the right places to hold the components.
I had an old PC that should have been thrown out. This came in handy for making the front and rear panels. A bit of snipping, filing and drilling and it turned out very satisfactorily.
The wiring was easy enough but had an issue with the aerial connection, that’s now solved and she’s up and running, great sound quality and heaps of stations to choose from
Just a couple of issues if you are thinking of making one!
Make sure you put a fuse between the power source and the radio as many car radios aren’t fused (they rely on a fuse banked in the car)
You will need to connect the ignition wire on the radio to the power cable on the radio and join to the power supply as one connection.
You will also need to leave the power supply on when you turn the radio off to keep the memory of your station settings. That is if you don’t have a 12v battery backup. Sounds more complicated than it is.
Your power supply needs to be a ‘linear’ supply
You may need an outside aerial connection if your reception is weak inside your shop.
Thanks for looking and Merry Christmas to all my LJ friends.
-- Grumpy - "Always look on the bright side of life"- Monty Python