re mc sbi mixer musone acsu buffalo edu mark j musone writes p s any really good books on am fm theory along with detailed electrical diagrams would help a lot i have seen a lot of theory books with no circuits and a lot of circuit books with no theory but one without the other does not help mixers have a wide variety of implementations the mini circuits part you mention is a doubly balanced diode mixer but active ones bjt fet seem more popular in consumer receivers you might call mcl they have a nice catalog the universal answer for wide coverage theory practice rf design is the arrl handbook published by the american radio relay league the radio amateur organization any technical bookstore can order you one the book is superb with lots of accessible theory construction projects and generally interesting stuff you might also check out solid state design for the radio amateur i think by hayward and someone this has sharper design and test information about subsystems like mixers peter monta monta image mit edu mit advanced television research program
