Medium frequency receiver

Discussion in 'Wireless & RF Design' started by squb, Jun 29, 2013.

  1. squb

    Thread Starter New Member

    Jun 29, 2013
    4
    0
    Hello all.

    I have problem with designing radio receiver which working on one frequency 457 kHz. I realize that I could use standard medium frequency radio receiver scheme
    and adjust circuit for 457 kHz.
    I would like to ask you guys ,if it is possible to build such a circuit where mixer and frequency conversion to 455 kHz is not used.

    I would like to try build circuit where signal (CW modulation) is received by by ferrite rod antenna then signal is toward to band pass filter ,then to class C power amplifier and then to A/D converter embedded in MCU.

    Do you think above circuit has chance to work ?
     
  2. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    "I have problem with designing radio receiver which working on one frequency 457 kHz. I realize that I could use standard medium frequency radio receiver scheme and adjust circuit for 457 kHz.
    I would like to ask you guys ,if it is possible to build such a circuit where mixer and frequency conversion to 455 kHz is not used. YES!

    I would like to try build circuit where signal (CW modulation) is received by by ferrite rod antenna then signal is toward to band pass filter ,then to class C power amplifier and then to A/D converter embedded in MCU.

    Do you think above circuit has chance to work I do not see a circuit above.
     
  3. Ramussons

    Active Member

    May 3, 2013
    557
    92
    Can you lay your hands on an old AM/SW receiver? The ones that used transistors? The IF amplifier used in these Radios were of 3 stage tuned to frequencies between 455 and 470 KHz. Re tune them and they will serve your "receiver" requirements.

    Ramesh
     
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