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.

 

I realize the info Ive left is vague......

Post a schematic of what you have built and you will get more involvement/interest in your thread.

 

Here is a link;
http://www.bowdenshobbycircuits.info/radio.htm

 

OH a link. How nice.


Here is a link to my answer then.

www.google.com

 

 

That is directly from here

http://www.bowdenshobbycircuits.info/radio.htm

Did you read his extensive write up on the functioning and tuning of the circuit?

 

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.

 

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