Quote:
Originally Posted by okantex
J_Player ,
do you think that emfad is narrow band reciver, yes it has a tunner , but it's range is too much.when this circuits bands are considered to emfad it is enough narrow
look , with wide band ,you wont able to recieve more frequencies at each listening.you will generally have one frequency ,but when you have more frequency at same time , you will always tune your led to powerfull station's upper noise level as PDK does fro VHF waves. it will be good to add multiturn pot as threshold adjustment.
what do you think of it.
but still this receiver has less tr than emfad.
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I think this circuit is a good toy to experiment with to learn the directional properties of ferrite antennas.
I do not think it is a narrow band tuner.
I think if you want a narrow band tuner, then you should select the narrow band that you want to investigate, and then build a new design narrow band tuner to listen for your frequency.
Best wishes,
J_P