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Old 16th March 2002, 06:36 PM   #1
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Default DIY FM Tuner?

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
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Old 16th March 2002, 10:15 PM   #2
paulb is offline paulb  Canada
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Only one I've seen:
http://www.velleman.be/kits/k4500.htm

Any particular reason you want a tube-based design? Velleman has some tube kits, but I don't think they have a tuner.
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Old 16th March 2002, 10:22 PM   #3
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Default 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!
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Old 16th March 2002, 11:25 PM   #4
paulb is offline paulb  Canada
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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!
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Old 18th March 2002, 04:46 PM   #5
Alex M is offline Alex M  United Kingdom
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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
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Old 30th March 2002, 07:55 AM   #6
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Default 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
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Old 4th April 2002, 01:00 AM   #7
Lenin is offline Lenin  United Kingdom
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Default 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!
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Old 4th April 2002, 08:45 AM   #8
AuroraB is online now AuroraB  Norway
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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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Old 2nd July 2002, 07:19 PM   #9
FBJ is offline FBJ  United States
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I know this is a very late post but I couldn't remember where I seen this info about DIY Tuners untill now.
http://www.soton.ac.uk/~apm3/diyaudi...man_tuner.html
This site has some good info on modifying the Velleman tuner.
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Old 2nd July 2002, 09:18 PM   #10
e96mlo is offline e96mlo  Sweden
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http://engr.uark.edu/~lar/fireamps.html

A bit down on the page there is a schematic for a tube tuner.

/Marcus
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