DIY FM Tuner?

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groundloop

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Joined 2002
#1
I'd like to build a DIY FM Stereo Tuner. Can anyone recommend a source for plans, or even better, a kit? I'd prefer to build a tube project

I've searched around on the net for a few days now, without any luck. Doesn't anyone listen to the radio anymore?

Thanks, and Happy DIYing! -GroundLoop
 
#3
Thanks

Thanks for the pointer to the Velleman kit! I'm going to do some more reading on it.

I'm am on a tube kick, however. I've had some really bad luck with OpAmps of late. Trying to build a CMoy Head phone amp, but I've been unable to debug the little bugger. I thought a tube project would be a nice change!

-groundloop!
 
#4
The Cmoy should be fairly easy, have you asked the good folks at headwize for help? Or here; people are very helpful. I suggest you start a new thread if you want help from this site.
A kit is a good idea before you tackle something more on your own. Enjoy!
 
#5
I built the Velleman a couple of years ago, and I'd certainly recommend it. Although it's about as complex as you'd expect a stereo tuner to be, the instructions are mostly pretty clear and the finished article not only looks and feels like a professional product, but also sounds good.

I hot-rodded mine by replacing the electrolytic coupling caps with polypropylenes, adding a separate power supply for the analogue output stages and sticking on a balanced output stage. These mods definitely lift the sound quality to something pretty special (though I haven't listened to the balanced output properly yet).

The only problem I had with the tuner as originally supplied was a tendency to lose the station tunings once every few months, although I suspect that this was mostly a problem with my domestic AC supply.

My tuner is, unfortunately, out of action right now as an attempt to further upgrade the power supplies left the tuner un-tunable. Since other projects kept getting in the way, I bought a cheap Denon tuner which doesn't sound nearly as good, but I'll get it back on the road again some time soon.

Alex
 
#6
no other?

Are you sure that is no other project available on the net?
I'm trying to built tuner,but as a real DIY project.
Alex M to you have some printable plans (shematics,circuit boards...) of this Velleman tuner?

Thanks
 
#7
Try Hart Electronics in the UK

Yeah, give these guys a go. The carry a John Linsley-Hood design, which I think is available as a kit. (Geoff will appear shortly to put me straight)

Don't have a web address for them but I suspect that there is a link from Geoff's (The Class-A Amplifier Site)

Good luck comrade!
 
#8
Back in 1992 and 1994 ( I think ), two different projects were presented in Elektor, but I don't know if these are still availible.
One of these designs used very high quality crystal filters ( Toko ) spesifically designed for high quality FM.

Scehmatics should be available somehow, but a larger question is for the CPU program to control the thing.....
 
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