Shortwave with AM/FM IC - RF Cafe Forums
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Post subject: Shortwave with AM/FM IC Posted: Mon Aug 15, 2005 4:44 pm
Joined: Sat Apr 23, 2005 2:09 pm
Location: Tampa, FL
I'm curious. Do you think this idea is feasible? I wanted to process SW signals using an AM/FM IC. I only want to demodulate amplitude modulated SW signals. I was thinking that if down-convert the SW frequency to AM levels, then I can just send the down-converted frequency to the IC.
Any tips would be greatly appreciate. Thanks!
Post subject: Use of Single-chip receiver as IFPosted: Tue Aug 16, 2005 5:48 pm
Absolutely you can do this - the amateur radio community has used this approach for years. The NE602 IC is a favorite in that community for the downconverter stage. Its only problem is its low 3rd order intercept - which means that it overloads more easily than one might like.