ve7gc popcorn rf preamplifier circuit

  
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Right here is definitely an simple VE7GC Popcorn RF preamplifier by Dick Pattinson. The circuit utilizes a single tuned circuit at the front end and can connect straight to a mixer or product detector in a simple receiver project. Note how Dick provided adjustable RF gain control for this circuit in his Wee Willy project on this web page. In case
ve7gc popcorn rf preamplifier circuit - schematic

you can not get Tak Lee green 10. 7 MHz IF coils, most likely any other brand of 10. 7 MHz slug tuned IF transformer would do the job. The Mouser catalog number is 421F123. In case your 10. 7 MHz IF coil has a built in capacitor at the base, take it out. A fixed inductor may also be wound applying a powdered iron torroid core and then all or a portion of the C1 capacity would be designed variable. The input impedance is 50 ohms and the output impedance is low because of the Q2 emitter follower stage. The power supply with voltage of 12V is needed to operate this circuit.



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