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Wideband FM receiver 50-70MHz

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The only circuits i can find is the TDA7000 chip which are awful.

I need good audio wideband FM receiver (able to pass MPX stereo and RDS) and tunable from about 50-70MHz.

Anyone good with radio receivers? really need a bit of help with this, i thought starting with the TDA7000 would be a good choice but obviously not. I see circuits for these and they use alot of coils, there seems to be quite a bit to them.

Thanks
 
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Were are you going to find a wideband FM signal with stereo to listen to? That spectrum will go dead in about 8 months when Analog TV broadcasting in the US comes to an end.
 
Why not just modify a standard FM receiver (88-108Mhz) to receive on 50-70Mhz by changing the 1st LO frequency (To say 60.7-80.7Mhz) and rebuild the RF front end? That way you'd avoid all the coils, etc in the IF section at least.
 
Why not just modify a standard FM receiver (88-108Mhz) to receive on 50-70Mhz by changing the 1st LO frequency (To say 60.7-80.7Mhz) and rebuild the RF front end? That way you'd avoid all the coils, etc in the IF section at least.

sounds like quite a possible idea. However i'm not good on my radio receiver theory atall.
bit stuck!
 
With little knowledge of RF circuits, your attempt to reverse engineer a radio would be futile. Your best bet is to purchase a FM receiver kit. For example:
https://www.electro-tech-online.com/custompdfs/2008/06/fr146E.pdf
Even to tweak this kit you will need some RF knowhow to adjust the input circuits and VCO components, but it is possible. Perhaps if you study the circuits, and see if you can come up with values needed to operate at the range you want. I am sure there are peeps here that could assist you once you have studied what needs to be done.
Here is the link for the mixer IC.
https://www.electro-tech-online.com/custompdfs/2008/06/SA602A.pdf


I have to ask, why 50 MHz ?
 
With little knowledge of RF circuits, your attempt to reverse engineer a radio would be futile. Your best bet is to purchase a FM receiver kit. For example:
https://www.electro-tech-online.com/custompdfs/2008/06/fr146E-1.pdf
Even to tweak this kit you will need some RF knowhow to adjust the input circuits and VCO components, but it is possible. Perhaps if you study the circuits, and see if you can come up with values needed to operate at the range you want. I am sure there are peeps here that could assist you once you have studied what needs to be done.
Here is the link for the mixer IC.
https://www.electro-tech-online.com/custompdfs/2008/06/SA602A-1.pdf


I have to ask, why 50 MHz ?
cheers.
why 50MHz?
covers a good distance with not much power
fairly wideband
the band is pretty clear

thats basically it.
 
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