Superheterodyne AM Reciever

Thread Starter

shano80

Joined Sep 13, 2010
9
Hello, Im trying to build a L.O. with a 42IF300 transformer from mouser with a SA602 double balanced mixer and oscillator IC. Basically Im working on a superheterodyne AM reciever.I was expecting to be able to put an o-scope on pin 6 and get a frequency that is 455khz higher than the RF.Highest frequency I get with my L.O. configuration is 1500KHz using a 141/60pF capacitor.I realize the info Ive left is vague but if anyone is familiar with this any info properly constructing a L.O. for a superheterodyne AM reciever would be wonderful.
 

Thread Starter

shano80

Joined Sep 13, 2010
9
Hello, Im trying to build a L.O. with a 42IF300 transformer from mouser with a SA602 double balanced mixer and oscillator IC. Basically Im working on a superheterodyne AM reciever.I was expecting to be able to put an o-scope on pin 6 and get a frequency that is 455khz higher than the RF.Highest frequency I get with my L.O. configuration is 1500KHz using a 141/60pF capacitor.


 

bertus

Joined Apr 5, 2008
20,535
Hello,

Pin 6 is the input for the oscillator.
Pin 7 is the output for the oascillator.
The oscillator signal is very weak and can only be measured using a buffer.
See figure 6 in the attached datasheet for more info.

Bertus

PS I merged the threads as the subject is the same
 

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