Looking for "textbook" FM receiver schematic

[FenderBender11]

Hello,

I need a basic "textbook" example of a FM audio receiver...but I'm not sure exactly what to look for, for best results.

There seem to be a ton of ways to make a receiver, whether it is is single chip, discrete components, transistorized...etc.

Here's one that keeps on popping up whenever I search: One transistor FM radio project

Does anyone have any experience with either of those circuits, and how would they perform? I recently picked up the book "Secrets to RF Design" for $1, hoping it would have some direction...but somehow, it does not.

Any ideas?

Thanks.

(If this is in the wrong section, a moderator can move it, of course).

[EUVL]

This one is based on TDA7021 / TDA7040 chip set for FM stereo.

Mini-FM-Radio - ELEKTOR.de | Elektronik: Analog Digital Embedded Mikrocontroller Audio Messtechnik

Done correctly (i.e. not as that shown in Elektor), it does sound very decent.
And almost as simple as a single transistor radio. Not so compley as the JLH FM design.

FM/AM Tuner


Patrick

[FenderBender11]

Awesome thank you.

[sofaspud]

Have you looked at Dave Johnson's Discover Circuits? He has a lot of circuits to choose from. Joe Carr's "Secrets..." isn't a cookbook, but you got a great deal for $1.

[FenderBender11]

Originally Posted by sofaspud

Have you looked at Dave Johnson's Discover Circuits? He has a lot of circuits to choose from. Joe Carr's "Secrets..." isn't a cookbook, but you got a great deal for $1.

Oh yeah don't get me wrong. There's a lot of great information on technique and methodology. I was just hoping it would include a schematic and/or some direction. I thought it might be a good project to include.

I've looked on a lot of those circuit websites to very little avail. Either the FM circuits have been removed or they use some outdated chips etc.

I may just try Somersets 1-transistor design, and see how that works. I don't know too much about super regenerative design, so I may need to read up, so I lay it out correctly.

[AndrewT]

JLH did at least one FM radio design.
I think it was also offered as a kit a long while back.

[FenderBender11]

Originally Posted by AndrewT

JLH did at least one FM radio design.
I think it was also offered as a kit a long while back.

I'm not familiar with JLH. Do you have a link?

[AndrewT]

Sorry no link, I have not seen the article on the Web
I think the series of articles appeared in Wireless World during the 80s

Can anyone else help locating JLH FM tuner?

[FenderBender11]

Ah that's alright. I was investigating TDA7000...but there seems to be a lot of hatred for it...I'm not after hi-fi though, just want to try to see if I can get a small scale radio working...

Should I lean towards transistor FM or an IC?

[DF96]

I don't remember JLH doing a tuner. The classic Wireless World tuner was by Nelson-Jones. It was available as a kit from the same firm as some JLH designs, which may be why people associate it with him instead.

The N-J tuner was sometimes partnered with the Portus and Hayward stereo decoder, but alternatively one of the standard RCA or Hitachi chips could be used.